A research has been conducted on qualitative and quantitative of soft drinks preservative analysis. The analysis used chromathography. The calibration kurve of real standard was used to determine the concent of preservative. The concents of the drinks preservative would be suitable for the standard of preservative of Minister of Publik Health R.I No. 722/Menkes/per/IX/1988. The data was analyzed by using correlation and signification method between area and concentration and the result of the research has fulfilled quality standard of preservative
{"title":"Analysis of Preservatives in Packaged Drinks with Chromatography Techniques","authors":"Merry Yunita","doi":"10.54076/jumpa.v2i1.204","DOIUrl":"https://doi.org/10.54076/jumpa.v2i1.204","url":null,"abstract":"A research has been conducted on qualitative and quantitative of soft drinks preservative analysis. The analysis used chromathography. The calibration kurve of real standard was used to determine the concent of preservative. The concents of the drinks preservative would be suitable for the standard of preservative of Minister of Publik Health R.I No. 722/Menkes/per/IX/1988. The data was analyzed by using correlation and signification method between area and concentration and the result of the research has fulfilled quality standard of preservative","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90247073","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}
The purpose of this study was to determine the differences in students' mathematical abilities using the WhatsApp group and classroom platforms during the Covid-19 pandemic in class VIII of SMP Negeri 2 Hinai. This research method is to use quasi-experimental research. The number of samples in this study were 60 students divided into 2 class groups, namely the experimental class 1 which was taught using WhatsApp group, and the experimental class 2 which was taught using classroom. The data collection instruments were in the form of tests of students' mathematical understanding abilities before and after being given treatment (pretest and posttest). Based on the results of hypothesis testing with the t test technique, the value of t count> t table is 2.16> 2.04 so it can be concluded that there are differences in students' mathematical abilities using the WhatsApp group platform and classrooms during the Covid-19 pandemic in class VIII SMP. Negeri 2 Hinai. Students 'mathematical abilities using the WhatsApp group platform are superior to students' mathematical abilities using classroom.
本研究的目的是确定SMP Negeri 2 Hinai八年级学生在Covid-19大流行期间使用WhatsApp群和课堂平台的数学能力差异。本研究方法为准实验研究。本研究样本数量为60名学生，分为2个班级，实验1班采用WhatsApp群教学，实验2班采用课堂教学。数据收集工具为学生接受治疗前后的数学理解能力测试(前测和后测)。根据t检验技术的假设检验结果，t count> t表的值为2.16> 2.04，因此可以得出结论，在新冠肺炎大流行期间，SMP八班学生使用WhatsApp群平台和教室的数学能力存在差异。Negeri 2 Hinai。学生在WhatsApp群平台上的数学能力要优于在课堂上的数学能力。
{"title":"Differences Of Student's Mathematics Ability Using The Whatsapp Group And Classroom Platform During Pandemic Covid-19","authors":"Susi Agustin, Dira Puspita Sari","doi":"10.54076/JUMPA.V1I2.61","DOIUrl":"https://doi.org/10.54076/JUMPA.V1I2.61","url":null,"abstract":"The purpose of this study was to determine the differences in students' mathematical abilities using the WhatsApp group and classroom platforms during the Covid-19 pandemic in class VIII of SMP Negeri 2 Hinai. This research method is to use quasi-experimental research. The number of samples in this study were 60 students divided into 2 class groups, namely the experimental class 1 which was taught using WhatsApp group, and the experimental class 2 which was taught using classroom. The data collection instruments were in the form of tests of students' mathematical understanding abilities before and after being given treatment (pretest and posttest). Based on the results of hypothesis testing with the t test technique, the value of t count> t table is 2.16> 2.04 so it can be concluded that there are differences in students' mathematical abilities using the WhatsApp group platform and classrooms during the Covid-19 pandemic in class VIII SMP. Negeri 2 Hinai. Students 'mathematical abilities using the WhatsApp group platform are superior to students' mathematical abilities using classroom.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81782995","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}
Research has been done on rice husks. Rice husk is carried out in the carbonization process which is then carried out by the activation process. Furthermore, from the activation process, the impregnation process is carried out. Characterization using a thermo gravimetric analyzer (TGA) showed that the residue of impregnation of rice husk activated carbon was 61.83% and rice husk activated carbon was 89.72%.
{"title":"Comparison Of Thermo Gravimetric Characterization Of Active Carbon Analyzer Rice Husk With Rice Husk Implementation","authors":"Masdania Zurairah, Edy Syahputra Saragih, Misdawati Misdawati","doi":"10.54076/jumpa.v1i2.176","DOIUrl":"https://doi.org/10.54076/jumpa.v1i2.176","url":null,"abstract":"Research has been done on rice husks. Rice husk is carried out in the carbonization process which is then carried out by the activation process. Furthermore, from the activation process, the impregnation process is carried out. Characterization using a thermo gravimetric analyzer (TGA) showed that the residue of impregnation of rice husk activated carbon was 61.83% and rice husk activated carbon was 89.72%.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91086740","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}
The procurement of scholarship programs is one of the efforts made by the government, companies, or foundations to help individuals for the ongoing education that is being pursued, one of which is in the world of education such as STMIK Pelita Nusantara, where the campus is under the auspices of the Democrat Cemerlang Foundation, a foundation that participate in the provision of scholarship programs, both underprivileged scholarships and merit scholarships. In granting scholarships, many things must be considered so that the right decisions are made, namely the best students who meet the requirements and criteria that have been set and are not subjective. so far pthe campus is experiencing difficulties because there are many students who graduate each year while there are many conditions that must be considered, so faster, more precise and accurate steps are needed to help the campus determine students who are eligible to receive the scholarship.In this study, the TOPSIS method will be applied to select undergraduate scholarship recipients. The method was chosen because TOPSIS is a method whose basic concept is that the best alternative is the alternative that has the closest distance from the positive ideal solution and has the farthest distance from the negative ideal solution from the point of view ofgeometrically using Eucledian distance to determine the relative proximity of an alternative to the optimal solution. The results obtained in this study are that the TOPSIS method using 5 criteria can be applied in the selection of undergraduate scholarship recipients, where 2 out of 5 alternatives have the highest score of 0.657659 as well as scholarship recipients.
{"title":"Application of Topsis Method in Decision Support System Selection of Undergraduate Scholarship Recipients","authors":"Romiana Matanari","doi":"10.54076/jumpa.v1i2.141","DOIUrl":"https://doi.org/10.54076/jumpa.v1i2.141","url":null,"abstract":"The procurement of scholarship programs is one of the efforts made by the government, companies, or foundations to help individuals for the ongoing education that is being pursued, one of which is in the world of education such as STMIK Pelita Nusantara, where the campus is under the auspices of the Democrat Cemerlang Foundation, a foundation that participate in the provision of scholarship programs, both underprivileged scholarships and merit scholarships. In granting scholarships, many things must be considered so that the right decisions are made, namely the best students who meet the requirements and criteria that have been set and are not subjective. so far pthe campus is experiencing difficulties because there are many students who graduate each year while there are many conditions that must be considered, so faster, more precise and accurate steps are needed to help the campus determine students who are eligible to receive the scholarship.In this study, the TOPSIS method will be applied to select undergraduate scholarship recipients. The method was chosen because TOPSIS is a method whose basic concept is that the best alternative is the alternative that has the closest distance from the positive ideal solution and has the farthest distance from the negative ideal solution from the point of view ofgeometrically using Eucledian distance to determine the relative proximity of an alternative to the optimal solution. The results obtained in this study are that the TOPSIS method using 5 criteria can be applied in the selection of undergraduate scholarship recipients, where 2 out of 5 alternatives have the highest score of 0.657659 as well as scholarship recipients.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72703368","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}
The role of lecturers in higher education is one of the most influential parts of the quality of students produced. The educational qualification of lecturers is an important aspect of academic and institutional quality. So that many universities or educational institutions provide doctoral scholarship programs for potential lecturers.One of them is the Catholic University of Santo Thomas, Medan, which provides scholarships, namely doctoral scholarships for 5 outstanding lecturers. This research is a decision support system for doctoral scholarship recipients at the Catholic University of Santo Thomas Medan using the Simple Additive Weigting (SAW) method. The SAW method is used to determine the recipient of the S3 scholarship which is determined based on the criteria. This decision support system is built with a web-based application system as a tool in determining the decisions of lecturers who receive doctoral scholarships at the Catholic University of Santo Thomas Medan and uses MYSQL as a database.
{"title":"Decision Support System in Determining Scholarship Recipient Lecturers Using the Simple Additive Weighting (SAW) Method","authors":"Nissi Pangaribuan","doi":"10.54076/JUMPA.V1I2.124","DOIUrl":"https://doi.org/10.54076/JUMPA.V1I2.124","url":null,"abstract":"The role of lecturers in higher education is one of the most influential parts of the quality of students produced. The educational qualification of lecturers is an important aspect of academic and institutional quality. So that many universities or educational institutions provide doctoral scholarship programs for potential lecturers.One of them is the Catholic University of Santo Thomas, Medan, which provides scholarships, namely doctoral scholarships for 5 outstanding lecturers. This research is a decision support system for doctoral scholarship recipients at the Catholic University of Santo Thomas Medan using the Simple Additive Weigting (SAW) method. The SAW method is used to determine the recipient of the S3 scholarship which is determined based on the criteria. This decision support system is built with a web-based application system as a tool in determining the decisions of lecturers who receive doctoral scholarships at the Catholic University of Santo Thomas Medan and uses MYSQL as a database.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84958431","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}
Mangapul Pardede, Herlina J. EL- Matury, Saiful Batubara
This study analyzes the level of disaster preparedness in inpatient health centers in Toba Regency. The variables studied were disaster potential, structural safety, non-structural safety, and functional aspects. The results showed that the preparedness scores for the Ajibata Inpatient Health Center and the Parsoburan Inpatient Health Center required both inpatient health centers to intervene in the near future because they still had risks when facing disasters. Meanwhile, the Laguboti Inpatient Health Center is considered capable of protecting human life and still functioning in the event of a disaster. The structural safety score of the Ajibata Inpatient Health Center reflects that the structural security is adequate for disaster events. Meanwhile, the Parsoburan Inpatient Health Center still has a risk for disaster events. The non-structural safety scores of the Ajibata and Laguboti Inpatient Health Centers both still have risks in dealing with disasters. The Parsoburan Inpatient Health Center is not ready to face a disaster. The value of the functional aspects of the three Inpatient Health Centers shows that the three Inpatient Health Centers are not functionally ready to face disaster events. It is recommended that the three Inpatient Health Centers should continue to improve disaster preparedness.
{"title":"Disaster Preparedness Analysis At Intensive Health Centers In Toba Regency In 2020","authors":"Mangapul Pardede, Herlina J. EL- Matury, Saiful Batubara","doi":"10.54076/jumpa.v1i2.153","DOIUrl":"https://doi.org/10.54076/jumpa.v1i2.153","url":null,"abstract":"This study analyzes the level of disaster preparedness in inpatient health centers in Toba Regency. The variables studied were disaster potential, structural safety, non-structural safety, and functional aspects. The results showed that the preparedness scores for the Ajibata Inpatient Health Center and the Parsoburan Inpatient Health Center required both inpatient health centers to intervene in the near future because they still had risks when facing disasters. Meanwhile, the Laguboti Inpatient Health Center is considered capable of protecting human life and still functioning in the event of a disaster. The structural safety score of the Ajibata Inpatient Health Center reflects that the structural security is adequate for disaster events. Meanwhile, the Parsoburan Inpatient Health Center still has a risk for disaster events. The non-structural safety scores of the Ajibata and Laguboti Inpatient Health Centers both still have risks in dealing with disasters. The Parsoburan Inpatient Health Center is not ready to face a disaster. The value of the functional aspects of the three Inpatient Health Centers shows that the three Inpatient Health Centers are not functionally ready to face disaster events. It is recommended that the three Inpatient Health Centers should continue to improve disaster preparedness.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88662334","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}
Palm oil palm is one of the solid waste produced by oil palm plantations every harvest. Chemical analysis of palm oil palm oil pellets showed that there are components of cellulose, hemiscellulose, and lignin that show that palm oil pellets have the opportunity to be further processed into useful and economically valuable products. Palm waste contains cellulose by 34.89%, hemiscellulose by 27.14%, and lignin by 19.87%. The analysis conducted on raw materials includes the analysis of water content and cellulose levels of palm oil palm oil. 46.6% and cellulose levels of 29.2%. In this study quantitative analysis was conducted in the form of cellulose conversion and oxalic acid yield. The largest cellulose conversion was obtained at the use of 70% nitric acid concentration and 80 minutes reaction time of 58.56%.
{"title":"Making Oxalic Acid From Palm Oil Pelepah (Elaeis Guineensis) Through Nitric Acid Oxidation Reaction","authors":"I. Rahmadi","doi":"10.54076/jumpa.v1i1.36","DOIUrl":"https://doi.org/10.54076/jumpa.v1i1.36","url":null,"abstract":"Palm oil palm is one of the solid waste produced by oil palm plantations every harvest. Chemical analysis of palm oil palm oil pellets showed that there are components of cellulose, hemiscellulose, and lignin that show that palm oil pellets have the opportunity to be further processed into useful and economically valuable products. Palm waste contains cellulose by 34.89%, hemiscellulose by 27.14%, and lignin by 19.87%. The analysis conducted on raw materials includes the analysis of water content and cellulose levels of palm oil palm oil. 46.6% and cellulose levels of 29.2%. In this study quantitative analysis was conducted in the form of cellulose conversion and oxalic acid yield. The largest cellulose conversion was obtained at the use of 70% nitric acid concentration and 80 minutes reaction time of 58.56%.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81475997","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}
The process of exchanging digital messages is increasingly being used due to its easy and practical use. But the process of exchanging digital messages is vulnerable to being tapped by unauthorized people. Cryptography is the study of mathematical techniques related to aspects of information security, such as data confidentiality, data validity, data integrity, and data authentication. With cryptography, the process of exchanging messages between two people can be done securely. Thus, cryptographic techniques are used to overcome security issues when exchanging messages. The methods used in this study are hybrid hill cipher and RSA cryptography. In this study it was shown that hybrid hill cipher cryptography with a 3x3 matrix key and RSA with a 512 bit key can overcome security issues when exchanging data so that messages sent cannot be read by unauthorized people.
{"title":"Message Security Using a Combination of Hill Cipher and RSA Algorithms","authors":"Yogi Suryo Santoso","doi":"10.54076/jumpa.v1i1.38","DOIUrl":"https://doi.org/10.54076/jumpa.v1i1.38","url":null,"abstract":"The process of exchanging digital messages is increasingly being used due to its easy and practical use. But the process of exchanging digital messages is vulnerable to being tapped by unauthorized people. Cryptography is the study of mathematical techniques related to aspects of information security, such as data confidentiality, data validity, data integrity, and data authentication. With cryptography, the process of exchanging messages between two people can be done securely. Thus, cryptographic techniques are used to overcome security issues when exchanging messages. The methods used in this study are hybrid hill cipher and RSA cryptography. In this study it was shown that hybrid hill cipher cryptography with a 3x3 matrix key and RSA with a 512 bit key can overcome security issues when exchanging data so that messages sent cannot be read by unauthorized people.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88814333","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}
It has been made of construction ceramics using the volcanic dust of Mount Sinabung combined with kaolin, clay, feldspar and water as a mixture. with the composition of kaolin, feldspar, clay, volcanic dust of Mount Sinabung. Sample making is done starting with the sifting stage of 100 mesh materials and mixing materials up to homogeneous 15 minutes, printing with a 5 ton emphasis with a temperature combustion of 1100oc and in hold for 2 hours. With the characteristics of construction ceramics has been tested that is shrinkage mass 6.99-13.53%; porosity 4.84-10.46%; strong press 2.5-14.6 Mpa; hardness 84.7-169.6 kgf/mm2.
{"title":"The Effect of Mount Sinabung Volcanic Dust Mixture on The Strength of Construction Ceramics","authors":"Dosni Tahi Sipahutar","doi":"10.54076/jumpa.v1i1.32","DOIUrl":"https://doi.org/10.54076/jumpa.v1i1.32","url":null,"abstract":"It has been made of construction ceramics using the volcanic dust of Mount Sinabung combined with kaolin, clay, feldspar and water as a mixture. with the composition of kaolin, feldspar, clay, volcanic dust of Mount Sinabung. Sample making is done starting with the sifting stage of 100 mesh materials and mixing materials up to homogeneous 15 minutes, printing with a 5 ton emphasis with a temperature combustion of 1100oc and in hold for 2 hours. With the characteristics of construction ceramics has been tested that is shrinkage mass 6.99-13.53%; porosity 4.84-10.46%; strong press 2.5-14.6 Mpa; hardness 84.7-169.6 kgf/mm2.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77238878","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}
Research has been conducted on the manufacture and characterization of pineapple leaf fiber composites – polypropylene matrix. Samples with comparison of pineapple leaf fiber composition: polypropylene matrix by 0 %: 100%, 5%: 95%, 10%:90%, 15%:85%, 20%;80%, and 25%:75%. The manufacture of SDN-PP composites, i.e. fiber soaked with NaOH 5% for 2 hours and then rinsed with clean water and dried, then weighed. Polypropylene and MAPP are effluxed with xylen solvent using a reflux device over a hot plate with a temperature of 17oC until melted. The polypropylene that has been diflux weighed in mass and pineapple leaf fibers are placed into a mold then pressed with a hot press at a temperature of 150oC for 30 minutes. The purpose of the study was to find out the physical and mechanical properties of pineapple leaf-matrix polypropylene fibers. Density values 0.75 g/cm3 to 0.9 g/cm3, water absorption values 0.54% to 14.38%, strong compressive values 25.09 MPa to 49.58 MPa, and strong values impact 9.74 J/mm2 to 34.18 J/mm2. Pineapple leaf fiber composite – the resulting polypropylene matrix can be categorized as a high-crust fiberboard (HF) and applied as a decorative board in accordance with the fiberboard standards set out in SNI 01-4449-2006.
{"title":"Manufacture and Characterization of Pineapple Leaf Fiber Composite Board With Polypropylene Adhesive","authors":"Fatimah Marwa Nasution","doi":"10.54076/jumpa.v1i1.37","DOIUrl":"https://doi.org/10.54076/jumpa.v1i1.37","url":null,"abstract":"Research has been conducted on the manufacture and characterization of pineapple leaf fiber composites – polypropylene matrix. Samples with comparison of pineapple leaf fiber composition: polypropylene matrix by 0 %: 100%, 5%: 95%, 10%:90%, 15%:85%, 20%;80%, and 25%:75%. The manufacture of SDN-PP composites, i.e. fiber soaked with NaOH 5% for 2 hours and then rinsed with clean water and dried, then weighed. Polypropylene and MAPP are effluxed with xylen solvent using a reflux device over a hot plate with a temperature of 17oC until melted. The polypropylene that has been diflux weighed in mass and pineapple leaf fibers are placed into a mold then pressed with a hot press at a temperature of 150oC for 30 minutes. The purpose of the study was to find out the physical and mechanical properties of pineapple leaf-matrix polypropylene fibers. Density values 0.75 g/cm3 to 0.9 g/cm3, water absorption values 0.54% to 14.38%, strong compressive values 25.09 MPa to 49.58 MPa, and strong values impact 9.74 J/mm2 to 34.18 J/mm2. Pineapple leaf fiber composite – the resulting polypropylene matrix can be categorized as a high-crust fiberboard (HF) and applied as a decorative board in accordance with the fiberboard standards set out in SNI 01-4449-2006.","PeriodicalId":17729,"journal":{"name":"Jurnal Matematika Dan Ilmu Pengetahuan Alam LLDikti Wilayah 1 (JUMPA)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77400620","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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