International Journal of Polymer Analysis and Characterization最新文献_第9页

High-performance biodegradable triboelectric nanogenerators using CoFe2O4 filled poly (butylene adipate-co-terephthalate) 使用 CoFe2O4 填充聚（己二酸丁二醇酯-对苯二甲酸乙二醇酯）的高性能可生物降解三电纳米发电机

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-11-16 Epub Date: 2024-10-14 DOI: 10.1080/1023666X.2024.2410762

Vishnu Kadabahalli Thammannagowda , Kariyappa Gowda Guddenahalli Shivanna , Smitha Ankanahalli Shankaregowda , Prashantha Kalappa

The hunt for sustainable and efficient energy harvesting and storage devices has driven significant interest in triboelectric nanogenerators (TENGs) as potential alternatives to traditional batteries for powering electronic devices. However, the development of biodegradable TENGs remains a formidable challenge. This study presents the preparation of a tribopositive material entirely composed of biodegradable poly(butylene adipate-co-terephthalate) (PBAT) polymer enhanced with CoFe₂O₄ (CF) nanoparticles. The CF nanoparticles, synthesized via the combustion method, were incorporated into the PBAT matrix through solvent casting to form films with varied filler content (0.2, 0.4, 0.6, 0.8, and 1 g). The CF nanoparticles structural, surface, and electrical properties were characterized using XRD and FTIR spectroscopy. At the same time, the morphology of the nanomaterials and their composites was analyzed by scanning electron microscopy. Specifically, the 0.8 g PBAT-CF TENG demonstrated superior performance, achieving an output voltage of 45.45 V and a current of 4.5 µA. Subsequent electrical studies, including charging commercial capacitors (1.0 to 47 μF) and powering LEDs and calculators, underscored the device’s efficiency. The PBAT-CF TENG also effectively generated voltage and current signals from physical activities like walking and jumping. This innovative approach highlights the potential for biodegradable, high-performing, self-powered flexible electronics, and wearable devices, paving the way for sustainable technological advancements.

对可持续和高效能源采集和存储设备的追求，促使人们对三电纳米发电机（TENGs）产生了浓厚的兴趣，并将其作为传统电池的潜在替代品，为电子设备供电。然而，开发可生物降解的 TENGs 仍然是一项艰巨的挑战。本研究介绍了一种完全由可生物降解的聚己二酸丁二醇酯（PBAT）聚合物和 CoFe2O4（CF）纳米颗粒组成的摩擦正极材料的制备方法。通过燃烧法合成的 CF 纳米粒子通过溶剂浇铸法加入到 PBAT 基质中，形成不同填料含量（0.2、0.4、0.6、0.8 和 1 克）的薄膜。利用 XRD 和傅立叶变换红外光谱对 CF 纳米粒子的结构、表面和电学特性进行了表征。同时，利用扫描电子显微镜分析了纳米材料及其复合材料的形态。具体而言，0.8 克 PBAT-CF TENG 表现出卓越的性能，输出电压达到 45.45 V，电流为 4.5 µA。随后进行的电学研究，包括为商用电容器（1.0 至 47 μF）充电以及为 LED 和计算器供电，都凸显了该器件的效率。PBAT-CF TENG 还能有效地从步行和跳跃等身体活动中产生电压和电流信号。这种创新方法凸显了可生物降解、高性能、自供电柔性电子器件和可穿戴设备的潜力，为可持续技术进步铺平了道路。

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引用次数: 0

Dynamic mechanical analysis of additively manufactured cenosphere-filled PETG syntactic foam composite 增材制造仙人球填充 PETG 合成泡沫复合材料的动态力学分析

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-11-16 Epub Date: 2024-09-26 DOI: 10.1080/1023666X.2024.2404906

Jitendra Kumar , Sushant Negi

Syntactic foam composite (SFC) has the potential to substitute the conventional material used in damage-tolerance, thermal insulation, and weight-sensitive applications such as automotive parts, submarine structures, etc. Here, SFCs were developed by varying the weight fraction of cenosphere (CS) content from 0-40 wt. % in a polyethylene terephthalate glycol (PETG) matrix. This investigation provides the terse behavior of the viscoelastic properties of 3D-printed PETG/CS foam composites. The thermogravimetric analysis (TGA) results showed that the initial degradation temperature (T_i) and the temperature at 50% mass loss (T₅₀) of the composite filament increased with the addition of CS particles, indicating improved thermal stability. The dynamic mechanical analysis (DMA) results revealed that the storage modulus of SFC increased with increasing cenosphere content. The foam composite’s glass transition temperature (78.9 ± 0.35 °C) is lower by 4 °C than pure PETG. This underscores the potential of the developed syntactic foam composite to effectively utilize industrial waste fly ash through 3D printing routine, thereby promoting sustainable manufacturing practices.

合成泡沫复合材料（SFC）具有替代传统材料的潜力，可用于耐损伤、隔热和对重量敏感的应用领域，如汽车零件、潜艇结构等。在这里，通过改变聚对苯二甲酸乙二醇（PETG）基体中的碳圈（CS）重量分数（0-40 wt.%），开发出了 SFC。这项研究提供了三维打印 PETG/CS 泡沫复合材料粘弹性能的简明行为。热重分析（TGA）结果表明，复合丝的初始降解温度（Ti）和质量损失 50%时的温度（T50）随着 CS 粒子的加入而升高，表明热稳定性得到改善。动态力学分析（DMA）结果表明，SFC 的存储模量随纤球含量的增加而增加。泡沫复合材料的玻璃化转变温度（78.9 ± 0.35 °C）比纯 PETG 低 4 °C。这凸显了所开发的合成泡沫复合材料通过三维打印程序有效利用工业废弃粉煤灰的潜力，从而促进了可持续生产实践。

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引用次数: 0

Preparation and characterization of fumed silica added PMMA denture base materials 制备添加了气相二氧化硅的 PMMA 义齿基托材料并确定其特性

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-11-16 Epub Date: 2024-10-17 DOI: 10.1080/1023666X.2024.2410754

Hakki Cenker Kucukesmen , Mehmet Fahri Sarac

This study was carried out to investigate the chemical, mechanical, and structural properties of increasing amounts of fumed silica added to PMMA denture base material. The effect of adding fumed silica at three different concentrations (0.5%, 1%, and 2% by weight) to PMMA was studied using Fourier transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA), density, flexural strength, hardness, atomic force microscopy (AFM), and scanning electron microscopy (SEM). The results showed that the highest flexural strength values (105.64 MPa) and hardness (20.07 microvickers) were obtained with 1% wt. of fumed silica material. According to DMA results, fumed silica samples containing 1% wt. had the highest energy storage (3.24 GPa at 30 °C) and glass transition temperature. As a result, fumed silica in PMMA denture base material reached its maximum saturation limit at 1% wt. A more brittle behavior was observed in samples containing 2% fumed silica, which accumulated on the surface, as confirmed by AFM. The molecular bonds at the resin-fumed silica interface weaken due to the agglomeration of fumed silica. Consequently, the flexural strength and hardness decrease, along with the glass transition temperature and storage modulus. The potential applications of this research are vast, inspiring further exploration and innovation in denture-based materials.

本研究旨在探讨在 PMMA 义齿基底材料中添加更多气相二氧化硅的化学、机械和结构特性。使用傅立叶变换红外光谱（FTIR）、动态机械分析（DMA）、密度、抗弯强度、硬度、原子力显微镜（AFM）和扫描电子显微镜（SEM）研究了在 PMMA 中添加三种不同浓度（0.5%、1% 和 2% 重量百分比）的气相法二氧化硅的效果。结果表明，重量百分比为 1%的气相法二氧化硅材料获得了最高的抗弯强度值（105.64 兆帕）和硬度（20.07 微伏）。根据 DMA 结果，含 1%重量的气相法二氧化硅样品具有最高的储能（30 °C 时为 3.24 GPa）和玻璃化转变温度。因此，PMMA 义齿基底材料中的气相法二氧化硅在 1%重量比时达到最大饱和极限。经原子力显微镜（AFM）确认，气相二氧化硅含量为 2% 的样品中的气相二氧化硅聚集在表面，表现出更脆的特性。由于气相二氧化硅的聚集，树脂-气相二氧化硅界面上的分子键减弱。因此，弯曲强度和硬度降低，玻璃化转变温度和储存模量也随之降低。这项研究的潜在应用领域非常广泛，激励着人们在义齿材料方面进行进一步的探索和创新。

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引用次数: 0

Fabrication and performance of short glass fiber reinforced polyamide composites 短玻璃纤维增强聚酰胺复合材料的制造和性能

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-11-16 Epub Date: 2024-09-13 DOI: 10.1080/1023666X.2024.2394222

Bedriye Ucpinar Durmaz , Elnura Artykbaeva , Ayse Aytac

This article deals with the impact of short glass fiber (GF) on the performance of 60/40 wt% of polyamide 6/polyamide 12 (PA6/PA12) blend. The short fiber-reinforced composites were fabricated by using melt compounding via twin screw extruder and injection molding. The morphological, water uptake, rheological, thermo-mechanical, and mechanical properties of the composites were discussed. The morphological observations show that the PA6/PA12 blend exhibited compatible morphology and also adhesion between the fiber and matrix was quite strong. The tensile strength/modulus and storage modulus of the blend were substantially improved with GF reinforcement as a result of these morphological findings. While the water uptake of neat PA6 decreased significantly after blending with PA12, the incorporation of GF further reduced the water uptake of the PA6/PA12 blend. The thermomechanical analysis showed the enhancement of the stiffness of the composites and also glass transition temperature increment.

本文探讨了短玻璃纤维（GF）对 60/40 wt%聚酰胺 6/ 聚酰胺 12（PA6/PA12）混合物性能的影响。短纤维增强复合材料是通过双螺杆挤出机熔融共混和注塑成型制成的。对复合材料的形态、吸水性、流变学、热力学和机械性能进行了讨论。形态观察结果表明，PA6/PA12 共混物呈现出兼容形态，纤维与基体之间的粘附力也相当强。由于这些形态学发现，在添加 GF 增强材料后，共混物的拉伸强度/模量和存储模量得到了大幅提高。与 PA12 共混后，纯 PA6 的吸水率明显降低，而 GF 的加入则进一步降低了 PA6/PA12 共混物的吸水率。热力学分析表明，复合材料的刚度提高了，玻璃化转变温度也提高了。

引用次数: 0

Combined kinetic analysis of thermal degradation characteristics and reaction mechanism of thin intumescent fire-retardant coating of steel structure 钢结构薄型膨胀型防火涂料热降解特性与反应机理的组合动力学分析

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-11-16 Epub Date: 2024-09-11 DOI: 10.1080/1023666X.2024.2399791

Fengju Shang , Jiaqing Zhang , Taiyun Zhu , Yi Guo , Yabin Fan , Shouwang Tao , Rui Liu , Yanming Ding

To determine the thermal kinetic triplets and elucidate the reaction mechanism of thin intumescent fire-retardant coatings (IFR) of steel structures, one efficient combined kinetic approach was implemented in this study. Thermogravimetric experiments were conducted in air atmosphere at four heating rates, and the whole IFR thermal degradation process was divided into two stages. The average activation energy values derived by model-free methods were 78.9 kJ/mol and 175.16 kJ/mol for Stage I (0<α < 0.2) and Stage II (0.2<α < 0.9), respectively. Furthermore, the linear Coats-Redfern (CR) and non-linear Masterplots models were applied to identify the possible reaction mechanism. It was found that the F3/2 mechanistic model was better suited to the main thermal degradation process. Then model reconstruction based on the F3/2 mechanism model was performed. The results showed that the reconstructed model had a strict linear relationship in the independence analysis and KCE analysis, along with a good agreement between the theoretical and experimental results. The current study provided new insights into the systematic thermal degradation mechanism of IFR, and the proposed kinetic model would be helpful for the thermal protection prediction for steel structure during fire.

为了确定钢结构薄膨胀型防火涂料（IFR）的热动力学三元组并阐明其反应机理，本研究采用了一种高效的组合动力学方法。在空气中以四种加热速率进行热重实验，将整个 IFR 热降解过程分为两个阶段。在第一阶段（0<α <0.2）和第二阶段（0.2<α <0.9），无模型方法得出的平均活化能值分别为 78.9 kJ/mol 和 175.16 kJ/mol。此外，还应用线性 Coats-Redfern (CR) 模型和非线性 Masterplots 模型来确定可能的反应机理。结果发现，F3/2 机理模型更适合主要的热降解过程。然后在 F3/2 机理模型的基础上进行了模型重构。结果表明，重构后的模型在独立性分析和 KCE 分析中具有严格的线性关系，理论结果与实验结果之间具有良好的一致性。本研究为系统研究 IFR 的热降解机理提供了新的视角，所提出的动力学模型将有助于火灾期间钢结构的热保护预测。

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引用次数: 0

Mechanical, Thermal, and Water Absorption Behavior of Ash Gourd (Benincasa Hispida) Peel Particles Filled Epoxy Composites 灰葫芦（Benincasa Hispida）果皮颗粒填充环氧树脂复合材料的力学、热学和吸水性能

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-10-02 Epub Date: 2024-07-24 DOI: 10.1080/1023666X.2024.2378890

Amit Agarwal , Vikas Upadhyay

Recently, bio-composites have attracted much attention due to their potential applications in various industries. The most notable benefits are the product’s low cost, biodegradability, lightweight, availability, and ability to solve environmental issues. The present research utilizes ash gourd (Benincasa hispida) peel, a food waste, as a filler material to produce epoxy (EP) composites. The effect of ash gourd peel particle percentage (ranging from 0 to 25 wt.%) was studied on the developed composites’ mechanical and thermal properties and water absorption behavior. The maximum tensile strength, flexural strength, and shore D hardness were 47.52 MPa, 2409.17 MPa, and 79.6respectively, when the ash gourd peel was 5% by weight in the composite. It was observed that the mechanical characteristics of manufactured bio-composites are negatively affected by the high concentration of ash gourd peel particles in the epoxy matrix. Also, increasing ash gourd peel particle fraction increases the water absorption of composites when immersed in distilled, sea, and tap water. The composite with 5% filler by weight absorbs water at a minimal rate when immersed in seawater. Thermogravimetric analysis was conducted to investigate the newly developed composite’s thermal behavior. In addition, a morphological examination of the fractured surfaces was carried out with assistance from a scanning electron microscope. The work presents ash gourd peel particles as the potential alternative to be used as filler in composites.

最近，生物复合材料因其在各行各业的潜在应用而备受关注。其最显著的优点是成本低、可生物降解、重量轻、可用性强，并能解决环境问题。本研究利用食物垃圾灰葫芦（Benincasa hispida）皮作为填充材料，生产环氧树脂（EP）复合材料。研究了灰瓜皮颗粒百分比（0 至 25 wt.%）对所开发复合材料机械性能、热性能和吸水性能的影响。当灰瓜皮在复合材料中的重量百分比为 5%时，复合材料的最大拉伸强度、弯曲强度和邵氏 D 硬度分别为 47.52 兆帕、2409.17 兆帕和 79.6。据观察，环氧基体中高浓度的灰瓜皮颗粒会对制造的生物复合材料的机械特性产生负面影响。此外，增加灰瓜皮颗粒的比例会增加复合材料在蒸馏水、海水和自来水中的吸水性。按重量计含有 5%填料的复合材料在浸入海水时的吸水率极低。为研究新开发的复合材料的热行为，进行了热重分析。此外，还利用扫描电子显微镜对断裂表面进行了形态学检查。这项研究提出了灰瓜皮颗粒作为复合材料填料的潜在替代品。

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引用次数: 0

Micromechanical modeling, thermal, and dielectric studies of poly (methyl methacrylate)-barium titanate composites 聚（甲基丙烯酸甲酯）-钛酸钡复合材料的微机械建模、热和介电研究

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-10-02 Epub Date: 2024-08-17 DOI: 10.1080/1023666X.2024.2391802

K. Umashankar , G. Kamala Vasanth , R. Krishna Prasad

Polymer composites containing poly (methyl methacrylate) (PMMA) and barium titanate (BaTiO₃) were synthesized using the solution mixing method. The electrical conductivity of PMMA is 6 × 10⁻⁹ S/cm, and adding 2% fillers reduces to 5 × 10⁻⁹ S/cm. The melting point of PMMA is 373 °C, and adding 2% and 4% fillers increased it to 376 °C and 379 °C, respectively. The polymer chains become less mobile and block macromolecules on the filler surface. The modulus of elasticity and mechanical tensile stress of the polymer composites with a 5-wt% of BaTiO₃ are 759.3 MPa and 75.6 MPa, respectively. The breakdown strength of PMMA is 203 KV and reduces with the addition of 5% filler to 144 KV. The values of E c/E m evaluated using the Tsai-Pagano, Christensen-Waals, ROM, Mori-Tanaka, and Halpin-Tsai models underpredict the modulus compared to experimental E c/E m values. Fourier spectroscopy confirmed the presence of Ti-O and BaTiO₃ bonds in the polymer composite. Scanning electron microscope images reveal spherical aggregates of BaTiO₃ coated with PMMA and an interparticle network. The dielectric constant of PMMA is 3 and increased with the addition of 2% and 4% fillers to 4 and 4.3, respectively.

采用溶液混合法合成了含有聚甲基丙烯酸甲酯（PMMA）和钛酸钡（BaTiO3）的聚合物复合材料。PMMA 的导电率为 6 × 10-9 S/cm，添加 2% 的填料后，导电率降至 5 × 10-9 S/cm。PMMA 的熔点为 373 ℃，添加 2% 和 4% 的填料后，熔点分别升至 376 ℃ 和 379 ℃。聚合物链的流动性变小，阻塞了填料表面的大分子。含有 5 重量百分比 BaTiO3 的聚合物复合材料的弹性模量和机械拉伸应力分别为 759.3 兆帕和 75.6 兆帕。PMMA 的击穿强度为 203 KV，添加 5%的填料后降至 144 KV。与实验 E c/E m 值相比，使用 Tsai-Pagano、Christensen-Waals、ROM、Mori-Tanaka 和 Halpin-Tsai 模型评估的 E c/E m 值对模量的预测不足。傅立叶光谱证实聚合物复合材料中存在 Ti-O 和 BaTiO3 键。扫描电子显微镜图像显示了涂有 PMMA 的 BaTiO3 的球形聚集体和粒子间网络。PMMA 的介电常数为 3，添加 2% 和 4% 的填料后，介电常数分别增至 4 和 4.3。

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引用次数: 0

Enhanced performance in a NASICON-incorporated solid polymer electrolyte 性能增强的 NASICON 掺杂固体聚合物电解质

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-10-02 Epub Date: 2024-08-07 DOI: 10.1080/1023666X.2024.2383460

Dharmendra Kumar , Shweta Mukherjee , Avirup Das

In the present work, a novel ‘doped ceramic-polymer composite’-based solid polymer electrolytes (SPEs) has been synthesized using Zr (LAZTP) and Nb (LANbTP)-doped LATP as a ceramic filler and polyacrylonitrile (PAN) as a host polymer via the solution cast method. A series of SPEs with different ceramic loadings ranging from 10, 20, 30, 40, and 80 wt. % have been investigated using XRD, SEM, and impedance analysis. XRD spectra show the presence of crystalline ceramic peaks in composite solid polymer electrolyte. Further, the homogeneous distribution of the filler has been confirmed by SEM images. For SPEs, the highest conductivity of 5.31 × 10⁻⁵ S cm⁻¹ has been obtained for PAN + LANbTP30 at room temperature. Whereas, the optimized conductivity for LATP-incorporated PAN shows 1.79 × 10⁻⁵ S cm⁻¹, and the LAZTP-incorporated sample shows a conductivity of 3.03 × 10⁻⁵ S cm⁻¹ at room temperature. Also, LANbTP-contained SPE shows excellent voltage stability of 4.90 V w.r.t. pure PAN.

本研究采用掺杂 Zr (LAZTP) 和 Nb (LANbTP) 的 LATP 作为陶瓷填料，以聚丙烯腈 (PAN) 作为主聚合物，通过溶液浇铸法合成了一种新型的 "掺杂陶瓷-聚合物复合材料 "型固体聚合物电解质 (SPE)。我们使用 XRD、SEM 和阻抗分析法研究了一系列具有不同陶瓷负载量（10、20、30、40 和 80 重量百分比）的 SPE。XRD 光谱显示，在复合固体聚合物电解质中存在结晶陶瓷峰。此外，SEM 图像也证实了填料的均匀分布。对于 SPE，PAN + LANbTP30 在室温下的最高电导率为 5.31 × 10-5 S cm-1。而加入 LATP 的 PAN 的最佳电导率为 1.79 × 10-5 S cm-1，加入 LAZTP 的样品在室温下的电导率为 3.03 × 10-5 S cm-1。此外，与纯 PAN 相比，含有 LANbTP 的 SPE 显示出 4.90 V 的出色电压稳定性。

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引用次数: 0

Fabrication, structure and optical characteristics of CuO/polymer nanocomposites materials for optical devices 用于光学设备的氧化铜/聚合物纳米复合材料的制备、结构和光学特性

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-10-02 Epub Date: 2024-09-06 DOI: 10.1080/1023666X.2024.2397392

B. M. Alotaibi , Reem Altuijri , A. Atta , E. Abdeltwab , M. M. Abdelhamied

The films of P(4ClAni)/CuO, which formed of mixing poly 4-chloroaniline P(4ClAni) by CuO, were fabricated by the casting solution method. The XRD confirmed the successful prepration of the P(4ClAni)/CuO films. Additionally, the effect of CuO on the optical characteristics was determined. The CuO increased the refractive index from 1.09 for P(4ClAni) to 1.11 for P(4ClAni)/CuO-1, and 1.19 for P(4ClAni)/CuO-3, respectively, while the oscillation energy E₀ dropped from 4.29 eV for P(4ClAni) to 3.57 eV for P(4ClAni)/CuO-1, 3.12 eV for P(4ClAni)/CuO-2, and 3.06 eV for P(4ClAni)/CuO-3. The charge transfer between P(4ClAni) and CuO increased optical conductivity as the CuO ratios increased. This suggests that modifications in the electronic structure of the composite due to the interactions between P(4ClAni) and CuO. Also, the plasma frequency increased from 0.87 x 10¹² s⁻¹ to 2.32 x 10¹² s⁻¹. These changes in optical parameters occurred when the polarization of the P(4ClAni)/CuO was altered. The study elucidated the advantages of incorporating CuO nanoparticles as fillers in improving the properties of P(4ClAni) structures. The obtained results indicate the P(4ClAni)/CuO composites were sucessfuly fabricated with novel characteristics that can be applied in flexible optical devices.

采用浇铸溶液法制备了聚 4-氯苯胺 P(4ClAni)/CuO 薄膜，该薄膜由 CuO 与聚 4-氯苯胺 P(4ClAni) 混合而成。XRD 证实了 P(4ClAni)/CuO 薄膜的成功制备。此外，还测定了 CuO 对光学特性的影响。CuO 分别将折射率从 P(4ClAni) 的 1.09 提高到 P(4ClAni)/CuO-1 的 1.11 和 P(4ClAni)/CuO-3 的 1.19，而振荡能 E0 则从 P(4ClAni)/CuO-1 的 4.29 eV下降到P(4ClAni)/CuO-1的3.57 eV、P(4ClAni)/CuO-2的3.12 eV和P(4ClAni)/CuO-3的3.06 eV。随着 CuO 比率的增加，P(4ClAni) 和 CuO 之间的电荷转移提高了光导率。这表明，P(4ClAni) 和 CuO 之间的相互作用改变了复合材料的电子结构。此外，等离子体频率从 0.87 x 1012 s-1 增加到 2.32 x 1012 s-1。当改变 P(4ClAni)/CuO 的极化时，光学参数就会发生这些变化。该研究阐明了加入 CuO 纳米粒子作为填料在改善 P(4ClAni) 结构性能方面的优势。研究结果表明，P(4ClAni)/CuO 复合材料的成功制备具有新颖的特性，可应用于柔性光学器件。

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引用次数: 0

Effect of heat treatment on charge states, thermophysical and mechanical properties of polypropylene doped with ZrO2 nanoparticles 热处理对掺杂 ZrO2 纳米粒子的聚丙烯的电荷状态、热物理性能和机械性能的影响

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2024-10-02 Epub Date: 2024-08-10 DOI: 10.1080/1023666X.2024.2387605

Hijran S. Ibrahimova , Tahir D. Ibragimov

Charge states, thermophysical and mechanical properties of polypropylene doped with zirconium oxide nanoparticles, and their changes during heat treatment at temperatures 60 °C, 100 °C, and 140 °C are studied. The methods used are thermal stimulated depolarization (TSD), scanning differential calorimetry (SDC), and mechanical life assessment. It is shown that with an increase in the concentration of the filler, the intensity of the TSD peaks increases up to 3 vol.%. A further increase in concentration leads to a decrease in the intensity of the peaks. The activation energy of charge release from traps, temperature of maximum of the peaks, and the magnitude of the accumulated charge in the traps have also maximal value at nanoparticle concentration of 3 vol.%. The study of charge characteristics of the nanocomposite with concentration of 3 vol.% after heat treatment shows that the intensity of TSD peaks, the temperature of peak maxima, and the activation energy of charge release increase with increasing pretreatment temperature. The magnitude of the charge accumulated in traps has a maximal value at treatment temperature of 140 °C owing to the increase in the number of traps. The melting point of the composite is 149.38 °C and shifts to 146.88 °C after heat treatment at 140 °C. It indicates that the high temperature of heat treatment leads to partial destruction of polymer chains, leading to a decrease in the critical melting temperature. The mechanical durability of PP + 3%ZrO₂ nanocomposite decreases with increase in pretreatment temperature.

掺杂纳米氧化锆的聚丙烯的电荷状态、热物理性能和机械性能及其在 60 ℃、100 ℃ 和 140 ℃ 热处理过程中的变化...

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引用次数: 0