Pub Date : 2023-04-28DOI: 10.1177/096739119400200201
M. Frounchi, R.P. Burford, R.P. Chaplin
Composites of poly allyldiglycolcarbonate (ADC) and nano-sized silica particles were investigated in search of an alternative method to improve the fracture toughness of ADC resin. Transmission ele...
{"title":"Silica nano-composites of Allyl Diglycol Carbonate Resin","authors":"M. Frounchi, R.P. Burford, R.P. Chaplin","doi":"10.1177/096739119400200201","DOIUrl":"https://doi.org/10.1177/096739119400200201","url":null,"abstract":"Composites of poly allyldiglycolcarbonate (ADC) and nano-sized silica particles were investigated in search of an alternative method to improve the fracture toughness of ADC resin. Transmission ele...","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138519377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-27DOI: 10.1177/09673911231172491
Assia Chichane, Radouane Boujmal, A. El Barkany
This present research aims to predict the mechanical behavior of the composite and hybrid composites based on a polypropylene matrix (PP) reinforced by organic/inorganic naturally occurring fillers using analytical and numerical models. It also aims to demonstrate the effect of hybridization on the global stiffness of the material. In this study, Voigt-Reuss models, Halpin-Tsai equations, the Hirsch model, and numerical simulation are applied to predict the effective elastic moduli of hybrid composites/composites with clay and other alfa fillers. The results obtained are compared with experimental data. Hirsch’s results match well with the experimental results for the alfa/PP composite. However, the values of the Halpin-Tsai model showed a good agreement with the experimental results for the alfa-clay/PP hybrid composite. The numerical results show good accordance with the experimental results with higher accuracy. The overall results provided a good indication of the effects of hybridization on the stiffness of the final hybrid composites.
{"title":"A comparative study of analytical and numerical models of mechanical properties of composites and hybrid composites reinforced with natural reinforcements","authors":"Assia Chichane, Radouane Boujmal, A. El Barkany","doi":"10.1177/09673911231172491","DOIUrl":"https://doi.org/10.1177/09673911231172491","url":null,"abstract":"This present research aims to predict the mechanical behavior of the composite and hybrid composites based on a polypropylene matrix (PP) reinforced by organic/inorganic naturally occurring fillers using analytical and numerical models. It also aims to demonstrate the effect of hybridization on the global stiffness of the material. In this study, Voigt-Reuss models, Halpin-Tsai equations, the Hirsch model, and numerical simulation are applied to predict the effective elastic moduli of hybrid composites/composites with clay and other alfa fillers. The results obtained are compared with experimental data. Hirsch’s results match well with the experimental results for the alfa/PP composite. However, the values of the Halpin-Tsai model showed a good agreement with the experimental results for the alfa-clay/PP hybrid composite. The numerical results show good accordance with the experimental results with higher accuracy. The overall results provided a good indication of the effects of hybridization on the stiffness of the final hybrid composites.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86512321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-26DOI: 10.1177/09673911231171479
Mitsuru Tanahashi, Kazuma Hirota
The present study fabricated high-performance silica/epoxy resin nanocomposites having a low coefficient of linear thermal expansion (CTE) and a high glass transition temperature ( Tg). This was accomplished by dispersing colloidal silica nanospheres having hydrophilic surfaces in epoxy resins, which limited the motion of the polymer chains. Nanocomposites were produced wherein isolated primary particles of colloidal silica without silane surface modification were dispersed uniformly. These particles were generated via the breakdown of loosely bound agglomerates of spherical silica particles during the agitation of a dispersion in an epoxy resin solution. Hydrogen bonding between hydroxyl groups on the hydrophilic surfaces of the dispersed silica nanoparticles and the cross-linked epoxy polymer network evidently limited thermally-induced motion of the polymer chains, resulting in a considerable reduction in the CTE and an increase in the Tg for the nanocomposite.
{"title":"A silica/epoxy resin nanocomposite exhibiting high thermal stability and low thermal expansion based on the uniform dispersion of hydrophilic colloidal silica nanospheres","authors":"Mitsuru Tanahashi, Kazuma Hirota","doi":"10.1177/09673911231171479","DOIUrl":"https://doi.org/10.1177/09673911231171479","url":null,"abstract":"The present study fabricated high-performance silica/epoxy resin nanocomposites having a low coefficient of linear thermal expansion (CTE) and a high glass transition temperature ( Tg). This was accomplished by dispersing colloidal silica nanospheres having hydrophilic surfaces in epoxy resins, which limited the motion of the polymer chains. Nanocomposites were produced wherein isolated primary particles of colloidal silica without silane surface modification were dispersed uniformly. These particles were generated via the breakdown of loosely bound agglomerates of spherical silica particles during the agitation of a dispersion in an epoxy resin solution. Hydrogen bonding between hydroxyl groups on the hydrophilic surfaces of the dispersed silica nanoparticles and the cross-linked epoxy polymer network evidently limited thermally-induced motion of the polymer chains, resulting in a considerable reduction in the CTE and an increase in the Tg for the nanocomposite.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87273441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-25DOI: 10.1177/09673911231171035
Eyad Sayed Abdallah Khalaf
A comparative study has been done to investigate the effect of carbon black (CB) and fumed silica (Si) on the physico-mechanical and thermal properties of Bagasse/styrene-butadiene rubber (B-SBR) composites. Based on the incorporation of 25 phr from natural ground bagasse powder (GBP) as a supplement reinforcing filler in styrene butadiene rubber (SBR) vulcanizates, two identical sets of formulations have been prepared using different concentrations (20, 40, 60 and 80 phr) of carbon black and silica as the main reinforcing fillers in SBR composites. The ground bagasse powder (GBP) employed in this work, has a selective grain size distribution ranging from about 20–180 μm. As well, 2.5 phr of maleic anhydride (MA) was incorporated to improve the interfacial adhesion between SBR and bagasse. The distinguishing effect of different fillers on the rheological properties was clearly established. Tensile strength, elongation at break, modulus at 100% elongation (M 100), hardness (Shore A), abrasion loss, degree of swelling, as well as, thermal gravimetric analysis (TGA) of the rubber vulcanizates were studied. The prepared samples were morphologically analysed by scanning electron microscopy (SEM). The tensile strength and M 100% values of carbon black-filled compounds were obviously higher than those of the silica filled ones. In addition, hardness, wear and swelling properties were improved more and more by increasing the filler content. Whereas, the Si filled B/SBR showed a decreasing trend in elongation at break values but with an evidently higher plateau than that of CB filled ones. Overall, the CB filled vulcanizates recorded dominant mechanical properties compared to the Si filled vucanizates. On the other hand, both fillers offered a noticeable improvement in thermal stability, but with a preference favored for the silica filled compounds. Furthermore, the findings for SEM were found to be in agreement with the observed mechanical properties. This study summarizes a detailed discussion of the emerging green technologies for tyre production and depicted comprehensive data from the available literature.
{"title":"A comparative study for the main properties of silica and carbon black Filled bagasse-styrene butadiene rubber composites","authors":"Eyad Sayed Abdallah Khalaf","doi":"10.1177/09673911231171035","DOIUrl":"https://doi.org/10.1177/09673911231171035","url":null,"abstract":"A comparative study has been done to investigate the effect of carbon black (CB) and fumed silica (Si) on the physico-mechanical and thermal properties of Bagasse/styrene-butadiene rubber (B-SBR) composites. Based on the incorporation of 25 phr from natural ground bagasse powder (GBP) as a supplement reinforcing filler in styrene butadiene rubber (SBR) vulcanizates, two identical sets of formulations have been prepared using different concentrations (20, 40, 60 and 80 phr) of carbon black and silica as the main reinforcing fillers in SBR composites. The ground bagasse powder (GBP) employed in this work, has a selective grain size distribution ranging from about 20–180 μm. As well, 2.5 phr of maleic anhydride (MA) was incorporated to improve the interfacial adhesion between SBR and bagasse. The distinguishing effect of different fillers on the rheological properties was clearly established. Tensile strength, elongation at break, modulus at 100% elongation (M 100), hardness (Shore A), abrasion loss, degree of swelling, as well as, thermal gravimetric analysis (TGA) of the rubber vulcanizates were studied. The prepared samples were morphologically analysed by scanning electron microscopy (SEM). The tensile strength and M 100% values of carbon black-filled compounds were obviously higher than those of the silica filled ones. In addition, hardness, wear and swelling properties were improved more and more by increasing the filler content. Whereas, the Si filled B/SBR showed a decreasing trend in elongation at break values but with an evidently higher plateau than that of CB filled ones. Overall, the CB filled vulcanizates recorded dominant mechanical properties compared to the Si filled vucanizates. On the other hand, both fillers offered a noticeable improvement in thermal stability, but with a preference favored for the silica filled compounds. Furthermore, the findings for SEM were found to be in agreement with the observed mechanical properties. This study summarizes a detailed discussion of the emerging green technologies for tyre production and depicted comprehensive data from the available literature.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87822532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-17DOI: 10.1177/09673911231171485
Junaid Naeem, T. Sultan, A. Shakoor, Inam karim
In this study, PEG and TiO2 were used to modify the properties of neat bitumen of grade 60/70. The physical and structural properties of the modified bitumen samples were investigated using penetration by grade, softening point, fire and flash point, ductility, and x-ray diffraction. Results showed that the physical properties of base bitumen were dependent on the polymer content. In the first phase bitumen was blended with PEG at different proportions (2%, 4%, 6%, and 8%). It was observed that stiffness in samples increases as we increase the polymer content which leads to a decrease in penetration and ductility values. The softening point increased with increasing polymer concentration. However, fire and flash point attained maximum value of 250°C and 240°C at 6% and decreased to 242°C and 238°C at 8% respectively. The optimal polymer content was found to be 6%. In a second phase, the effects of incorporation of various percentages of TiO2 (1.5% and 3%) in PEG modified bitumen have been investigated. XRD analysis has also been performed for nano and polymer modified bitumen. An increase in the interlayer spacing value (d) was observed which confirms the successful intercalation of PEG in neat bitumen. Incorporation of TiO2 in PEG modified bitumen affects the physical properties of polymer modified bitumen.
{"title":"“Modification of bitumen properties using polyethylene glycol and titanium dioxide (TiO2)”","authors":"Junaid Naeem, T. Sultan, A. Shakoor, Inam karim","doi":"10.1177/09673911231171485","DOIUrl":"https://doi.org/10.1177/09673911231171485","url":null,"abstract":"In this study, PEG and TiO2 were used to modify the properties of neat bitumen of grade 60/70. The physical and structural properties of the modified bitumen samples were investigated using penetration by grade, softening point, fire and flash point, ductility, and x-ray diffraction. Results showed that the physical properties of base bitumen were dependent on the polymer content. In the first phase bitumen was blended with PEG at different proportions (2%, 4%, 6%, and 8%). It was observed that stiffness in samples increases as we increase the polymer content which leads to a decrease in penetration and ductility values. The softening point increased with increasing polymer concentration. However, fire and flash point attained maximum value of 250°C and 240°C at 6% and decreased to 242°C and 238°C at 8% respectively. The optimal polymer content was found to be 6%. In a second phase, the effects of incorporation of various percentages of TiO2 (1.5% and 3%) in PEG modified bitumen have been investigated. XRD analysis has also been performed for nano and polymer modified bitumen. An increase in the interlayer spacing value (d) was observed which confirms the successful intercalation of PEG in neat bitumen. Incorporation of TiO2 in PEG modified bitumen affects the physical properties of polymer modified bitumen.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89825479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-15DOI: 10.1177/09673911231170126
S. Anush, Sinchana Jr, B. Gayathri, YR Girish, YP Naveen, M. Harshitha, Udayabhanu, Rohan N. Sagar, Ajeya Kp, Kalappa Prashantha
A novel adsorbent material for the removal of Copper and chromium metal ions from aqueous solution was prepared by modifying chitosan. Cross linked chitosan material was prepared using vanillin as a crosslinking agent and further it was incorporated with graphitic-C3N4 to obtain the polymeric matrix. The composite material thus obtained was characterized using various characterization techniques such as FTIR, TGA, SEM and XRD. A peak at 1658 cm−1 indicates the formation of Schiff base and the peaks at 2θ = 9°, 15°, 21° and 24° indicates the incorporation of g-C3N4 and the increased crytallinity of the composite material. Adsorption studies were done in order to obtain the maximum capacity of the adsorbent for the Copper and Chromium ions which were found to be 166.66 and 250 mgg−1 respectively. The adsorption isotherm best fitted a Langmuir model and the adsorptive process was found to have pseudo second-order kinetics showing the chemical sorption type. Thermodynamic studies indicated that the adsorption process was spontaneous and endothermic in nature.
{"title":"g-C3N4 based Chitosan Schiff base bio Nanocomposite for water purification","authors":"S. Anush, Sinchana Jr, B. Gayathri, YR Girish, YP Naveen, M. Harshitha, Udayabhanu, Rohan N. Sagar, Ajeya Kp, Kalappa Prashantha","doi":"10.1177/09673911231170126","DOIUrl":"https://doi.org/10.1177/09673911231170126","url":null,"abstract":"A novel adsorbent material for the removal of Copper and chromium metal ions from aqueous solution was prepared by modifying chitosan. Cross linked chitosan material was prepared using vanillin as a crosslinking agent and further it was incorporated with graphitic-C3N4 to obtain the polymeric matrix. The composite material thus obtained was characterized using various characterization techniques such as FTIR, TGA, SEM and XRD. A peak at 1658 cm−1 indicates the formation of Schiff base and the peaks at 2θ = 9°, 15°, 21° and 24° indicates the incorporation of g-C3N4 and the increased crytallinity of the composite material. Adsorption studies were done in order to obtain the maximum capacity of the adsorbent for the Copper and Chromium ions which were found to be 166.66 and 250 mgg−1 respectively. The adsorption isotherm best fitted a Langmuir model and the adsorptive process was found to have pseudo second-order kinetics showing the chemical sorption type. Thermodynamic studies indicated that the adsorption process was spontaneous and endothermic in nature.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83434803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-09DOI: 10.1177/09673911231166636
A. M. Abdel-Ghaffar
Recently the replacing of the petrochemical origin polymers with biopolymers and biocomposites which are environmental biodegradable polymers became a growing interest. The use of gamma radiation for synthesis and produce further modification of the biopolymers and biocomposites found to be suitable for biomedical application due to none using of toxic additives. Moreover, the radiation technique is the combining of preparation and sterilization in a one technological step thus, reducing time of the production and lower the costs. The use of gamma radiation technique in biomedical application is growing rapidly in controlled drug delivery, injectable materials, wound dressing, tissue engineering, immobilized enzymes and biosensors.
{"title":"Radiation synthesis and modification of biopolymers and polymeric composites for biomedical applications","authors":"A. M. Abdel-Ghaffar","doi":"10.1177/09673911231166636","DOIUrl":"https://doi.org/10.1177/09673911231166636","url":null,"abstract":"Recently the replacing of the petrochemical origin polymers with biopolymers and biocomposites which are environmental biodegradable polymers became a growing interest. The use of gamma radiation for synthesis and produce further modification of the biopolymers and biocomposites found to be suitable for biomedical application due to none using of toxic additives. Moreover, the radiation technique is the combining of preparation and sterilization in a one technological step thus, reducing time of the production and lower the costs. The use of gamma radiation technique in biomedical application is growing rapidly in controlled drug delivery, injectable materials, wound dressing, tissue engineering, immobilized enzymes and biosensors.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91532683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-09DOI: 10.1177/09673911221149548
N. Alharbi
In the present work, hydroxypropyl cellulose and hematite (α-Fe2O3) nanoparticles (HPC:Fe2O3NPs) composites in various ratios (20:0.5, 20:1, 20:1.5, and 20:2 wt:wt) were synthesised. X-ray diffraction (XRD), scanning electron microscopy (SEM), FTIR spectroscopy, and thermal analysis (DSC, and TGA) were used to examine the structural configuration and thermal properties of the produced composites. The IR crystallinity indices (TCI, LOI, and HBI) were also computed. XRD patterns reveal a mixture of amorphous HPC polymer components and Fe2O3NPs which identifies the relationship between the characteristics of the structure. Distributions and dispersions of Fe2O3NPs on the surface of HPC are apparent in SEM. FTIR absorbance spectra reveal that as the quantity of Fe2O3NPs increased alterations in the intensity, area, and band width were found indicating a change in the molecular configuration of HPC. Variations in the shape, size, and shifts in melting temperature to higher temperatures were found by DSC and TGA when the amount of Fe2O3NPs is increased which could be due to interactions between HPC and Fe2O3NPs. The antibacterial activity of the nanocomposites was tested against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli bacteria. The composites have good antibacterial activity, confirmed a high potential of antibacterial activity. The findings demonstrated that HPC:Fe2O3NPs composites lead to technological applications in a variety of medical applications.
{"title":"Synthesis of composites from hydroxypropyl cellulose:iron (III) oxide nanoparticles","authors":"N. Alharbi","doi":"10.1177/09673911221149548","DOIUrl":"https://doi.org/10.1177/09673911221149548","url":null,"abstract":"In the present work, hydroxypropyl cellulose and hematite (α-Fe2O3) nanoparticles (HPC:Fe2O3NPs) composites in various ratios (20:0.5, 20:1, 20:1.5, and 20:2 wt:wt) were synthesised. X-ray diffraction (XRD), scanning electron microscopy (SEM), FTIR spectroscopy, and thermal analysis (DSC, and TGA) were used to examine the structural configuration and thermal properties of the produced composites. The IR crystallinity indices (TCI, LOI, and HBI) were also computed. XRD patterns reveal a mixture of amorphous HPC polymer components and Fe2O3NPs which identifies the relationship between the characteristics of the structure. Distributions and dispersions of Fe2O3NPs on the surface of HPC are apparent in SEM. FTIR absorbance spectra reveal that as the quantity of Fe2O3NPs increased alterations in the intensity, area, and band width were found indicating a change in the molecular configuration of HPC. Variations in the shape, size, and shifts in melting temperature to higher temperatures were found by DSC and TGA when the amount of Fe2O3NPs is increased which could be due to interactions between HPC and Fe2O3NPs. The antibacterial activity of the nanocomposites was tested against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli bacteria. The composites have good antibacterial activity, confirmed a high potential of antibacterial activity. The findings demonstrated that HPC:Fe2O3NPs composites lead to technological applications in a variety of medical applications.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90226510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-02DOI: 10.1177/09673911231166631
Suaad Al Sawafi, M. Song
Multi-walled carbon nanotubes and high-density polyethylene (MWCNTs/HDPE) nanocomposite sheets with (1.0, 0.5, and 0.1) wt.% MWCNT were successfully prepared by coating the MWCNTs on the surface of the matrix particles (HDPE). The sample resistivities of the nanocomposites were investigated in relation to the temperature influence. Several findings could be drawn from these experiments: For instance, among all of the prepared MWCNT/HDPE nanocomposite sheets with (0.1, 0.5, and 1.0) wt. % MWCNT, the electrical resistivity of the 1.0 wt. % MWCNT/HDPE nanocomposite was 33.18 kΩ.m, demonstrating the best electrical conductivity. The resistivities of 0.1 wt. % and 0.5 wt. % samples were found to be 2594 and 372.23 kΩ.m respectively. Also, the measurements of temperature versus electrical conductivity revealed that the rise in temperature causes the electrical resistivity for the MWCNT/HDPE nanocomposites to increase due to the expansion of the distances between the conductive nanofillers (CNT), i.e., the sample resistivity increased under heating due to the thermal expansion of the polymer matrix. For example, the initial electrical resistivity for the 1.0 wt. % MWCNT/HDPE nanocomposite sheet decreased from 36.25 kΩ.m to 33.18 kΩ.m after the heat treatment. Besides, heat treatment could effectively improve the reproducibility of the MWCNT/HDPE nanocomposites. The reproducibility of the 1.0 wt. % MWCNT/HDPE nanocomposite was better than that of the 0.5 wt. % MWCNT/HDPE nanocomposite.
{"title":"Polymer/carbon nanotube nanocomposites as temperature sensing materials","authors":"Suaad Al Sawafi, M. Song","doi":"10.1177/09673911231166631","DOIUrl":"https://doi.org/10.1177/09673911231166631","url":null,"abstract":"Multi-walled carbon nanotubes and high-density polyethylene (MWCNTs/HDPE) nanocomposite sheets with (1.0, 0.5, and 0.1) wt.% MWCNT were successfully prepared by coating the MWCNTs on the surface of the matrix particles (HDPE). The sample resistivities of the nanocomposites were investigated in relation to the temperature influence. Several findings could be drawn from these experiments: For instance, among all of the prepared MWCNT/HDPE nanocomposite sheets with (0.1, 0.5, and 1.0) wt. % MWCNT, the electrical resistivity of the 1.0 wt. % MWCNT/HDPE nanocomposite was 33.18 kΩ.m, demonstrating the best electrical conductivity. The resistivities of 0.1 wt. % and 0.5 wt. % samples were found to be 2594 and 372.23 kΩ.m respectively. Also, the measurements of temperature versus electrical conductivity revealed that the rise in temperature causes the electrical resistivity for the MWCNT/HDPE nanocomposites to increase due to the expansion of the distances between the conductive nanofillers (CNT), i.e., the sample resistivity increased under heating due to the thermal expansion of the polymer matrix. For example, the initial electrical resistivity for the 1.0 wt. % MWCNT/HDPE nanocomposite sheet decreased from 36.25 kΩ.m to 33.18 kΩ.m after the heat treatment. Besides, heat treatment could effectively improve the reproducibility of the MWCNT/HDPE nanocomposites. The reproducibility of the 1.0 wt. % MWCNT/HDPE nanocomposite was better than that of the 0.5 wt. % MWCNT/HDPE nanocomposite.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74139950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-27DOI: 10.1177/09673911231166640
S. Sargsyan, A. Sargsyan, KM Khizantsyan, IG Aghajanyan, TS Sargsyan, KS Margaryan, A. Pompella
Silver nanocomposites were synthesized by the electrochemical method in the matrix of a copolymer of 1-vinyl-1,2,4-triazole with methacrylic acid, by combining the process of electrochemical polymerization with cathodic precipitation of metals on metal electrodes. In the electronic spectra of nanocomposites, absorption bands appear with a maximum in the region of 417–421 nm, which is typical for systems with zero valence silver. The IR spectra show that the polymer structure hardly changes during the formation of nanocomposites and films. The presence of silver in the amorphous polymer phase is indicated by the results of X-ray diffraction studies. The silver content in nanocomposites is 0–9%, which leads to an increase in the viscosity of nanocomposite solutions compared to solutions of the initial copolymers. Transmission electron microscopy data show that the synthesized nanocomposites consist of particles with a diameter of 1–12 nm, predominantly spherical.
{"title":"Electrosynthesis of silver metallonanocomposites in the 1-vinyl-1.2.4-triazole copolymer matrix with methacrylic acid","authors":"S. Sargsyan, A. Sargsyan, KM Khizantsyan, IG Aghajanyan, TS Sargsyan, KS Margaryan, A. Pompella","doi":"10.1177/09673911231166640","DOIUrl":"https://doi.org/10.1177/09673911231166640","url":null,"abstract":"Silver nanocomposites were synthesized by the electrochemical method in the matrix of a copolymer of 1-vinyl-1,2,4-triazole with methacrylic acid, by combining the process of electrochemical polymerization with cathodic precipitation of metals on metal electrodes. In the electronic spectra of nanocomposites, absorption bands appear with a maximum in the region of 417–421 nm, which is typical for systems with zero valence silver. The IR spectra show that the polymer structure hardly changes during the formation of nanocomposites and films. The presence of silver in the amorphous polymer phase is indicated by the results of X-ray diffraction studies. The silver content in nanocomposites is 0–9%, which leads to an increase in the viscosity of nanocomposite solutions compared to solutions of the initial copolymers. Transmission electron microscopy data show that the synthesized nanocomposites consist of particles with a diameter of 1–12 nm, predominantly spherical.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78563069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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