制备和结构热力学研究基于聚 (乙烯酸盐) 和聚化的可再生共聚合物
Chaima Bouyahya1,2, Panagiotis A Klonos1,3, Alexandra Zamboulis1
1Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece.
Polymers
|August 10, 2024
概括
从聚乙烯酸盐 (PESu) 和聚异索酸盐 (PISSu) 合成了新的可再生共聚合物. 增加异化物含量提高了热稳定性和玻璃过渡温度,表明成功的共聚合和材料硬化.
科学领域:
- 聚合物科学与工程 聚合物科学与工程
- 材料化学 材料化学
- 可再生聚合物可再生聚合物
背景情况:
- 开发可持续和可再生聚合物对于减少环境影响至关重要.
- 聚乙烯酸盐 (PESu) 是一种可生物降解的聚,而聚二索酸盐 (PISSu) 则提供了增强的特性.
- 同聚合提供了一种途径,通过结合不同的单体单体来定制聚合物的特性.
研究的目的:
- 为了合成和描述PESu和PISSu的新型可再生共聚合物.
- 为了研究异化物 (Is) 含量变化的对共聚合物结构,动力学和热性质的影响.
- 探索这些新型共聚合物的分子动力学和热降解机制.
主要方法:
- 在现场合成具有不同Is/PESu摩尔比率的PESu-PISSu共聚物.
- 使用介电光谱学进行分子动力学和分析性热解进行降解的综合性表征.
- 热重力测量分析 (TGA) 测量热稳定性和差分扫描热量测量 (DSC) 测量玻璃过渡温度 (Tg).
主要成果:
- 成功合成了具有优异细分分布的均质PESu-PISSu共聚物.
- 介电光谱学在这些材料中首次揭示了不同的局部和细分分子动力学.
- 玻璃过渡温度 (Tg) 随着Iis含量增加,单调地从-16°C增加到~56°C,表明硬化和加密.
结论:
- 异化物作为PESu-PISSu共聚物中的硬化剂,显著增强热性能和矩阵刚性.
- 合成的共聚合物表现出良好的热稳定性和可调节性质,基于同位体吸收分数.
- 这些可再生共聚合物代表了可持续应用的有希望的材料,比传统的PESu提供了更好的性能.
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