长期紫外线老化聚氯乙烯/氧化锌纳米复合材料的结构、热性能和寿命评估

IF 2.4 3区 化学 Q3 POLYMER SCIENCE
Faiza Faiza, Abraiz Khattak
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引用次数: 0

摘要

摘要 采用熔融混合技术制备了含有不同浓度氧化锌(ZnO)纳米颗粒的聚氯乙烯基纳米复合材料,然后对其进行压缩成型,以获得所需的形状(圆形)和厚度(1.5 毫米)。使用扫描电子显微镜、傅立叶变换红外光谱、X 射线衍射仪和光学显微镜进行构型分析。然后将制备好的样品暴露在强度为 5.11 mW/cm2 的紫外线下进行 5000 实验小时的老化。每 1000 小时分析一次紫外线老化对纳米复合材料结构和热行为的影响。随着填料浓度的增加,观察到纯 PVC 的结构降解超过 50%。经过 5000 小时老化后,2、4 和 6 phr 聚氯乙烯纳米复合材料的接触角值分别为 69°、93° 和 104°,疏水性等级分别为 HC3、HC2 和 HC2。在 60-220 °C 的温度范围内,使用差示扫描量热仪详细分析了紫外线老化对纳米复合材料热行为的影响。最后,使用统计计算法计算了所有样品的使用寿命,结果表明,含有 2 phrs 氧化锌的 PVC 的最大使用寿命为 17,750 实验小时,而含有 0 phrs 氧化锌的 PVC 的最大使用寿命为 8693 实验小时。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Structural, thermal and life span estimation of long-term ultraviolet aged PVC/ZnO nanocomposite

Structural, thermal and life span estimation of long-term ultraviolet aged PVC/ZnO nanocomposite

PVC-based nanocomposites with varying concentrations of zinc oxide (ZnO) nanoparticles are fabricated using the melt mixing technique and then subjected to compression molding to acquire desired shapes (circular) and thickness (1.5 mm). Conformational analysis is performed using scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffractometry, and optical microscopy. The prepared samples are then exposed under UV light having an intensity of 5.11 mW/cm2 for 5000 lab hours of aging. The effect of UV aging on the structural and thermal behavior of the nanocomposites is analyzed at every 1000 h. Structural degradation of more than 50% in the case of neat PVC has been observed to be reduced with the increase in filler concentration. The contact angle values for 2, 4 and 6 phr of PVC nanocomposites after 5000 h of aging are 69°, 93°, and 104° having hydrophobicity classes of HC3, HC2, and HC2, respectively. The detailed analysis to study the effect of UV aging on the thermal behavior of the nanocomposites is evaluated using differential scanning calorimetry in the temperature range of 60–220 °C. Finally, the life span of all the samples was calculated using statistical calculations and it was observed that PVC with 2 phr of ZnO showed a maximum lifetime of 17,750 lab hours whereas for PVC with 0 phr of ZnO 8693 lab hours were calculated.

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来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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