开发高性能和可持续的聚乳酸/再生聚烯混合物:调整功能组反应的程度和性能优化
Lingxiao Yu1, Ying Qiu2, Bing Yang3
1Liaoning Provincial Key Laboratory for Synthesis and Preparation of Special Functional Materials, Shenyang University of Chemical Technology, Shenyang 110142, Liaoning, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
International journal of biological macromolecules
|December 9, 2024
概括
这项研究增强了可生物降解的聚乳酸 (PLA) 通过结合循环聚乙烯和乙烯-烯共聚合物修改与甘氨基甲基烯酸和 styrene. 由此产生的材料表现出更好的性和热性能,支持可持续塑料.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 可持续化学 可持续化学
背景情况:
- 像聚乳酸 (PLA) 这样的可生物降解塑料为环境带来了好处,但其性和热性能不佳,限制了它们的广泛应用.
- 回收塑料,如回收线性低密度聚乙烯 (R-LLDPE),为材料改造提供经济和生态优势.
- 乙烯-氧乙烯共聚物 (POE) 以其出色的性和耐热性而闻名,使其成为合适的修饰剂.
研究的目的:
- 通过引入一种新型修饰剂来增强聚乳酸 (PLA) 的机械和热性能.
- 为了研究合成的移植共聚合物 (R-LLDPE/POE) -g-(GMA-co-St) (RPGS) 对PLA特性的影响.
- 开发一种环保和成本效益高的生产高性能可生物降解塑料的方法.
主要方法:
- 使用R-LLDPE,POE,糖甲基酸盐 (GMA) 和烯 (St) 合成一个移植共聚合物 (RPGS).
- 用合成的RPGS修饰剂对PLA树脂进行修改.
- 对PLA/RPGS混合物的表征,分析不同GMA含量对微观结构和性能的影响.
主要成果:
- 在R-LLDPE/POE链上成功将GMA接种,而St则提高了接种效率.
- 由于GMA的环氧基和PLA的基基之间的反应,改善了PLA和RPGS之间的兼容性,减少了分散相粒子大小.
- 在RPGS中使用5%重量的GMA实现最佳性能:降低雾 (28.3%),增加光传导率 (92.5%),更高的热分解 (368.12°C) 和Vicat软化 (78.2°C) 温度,显著增强口冲击强度 (10,182.4 J/m2) 和破裂时的延伸 (231.7%).
结论:
- 开发的RPGS修饰器有效地提高了PLA的性和耐热性,克服了其固有的局限性.
- 经过修改的基于PLA的材料具有卓越的机械和热性能,具有财务和环境的好处.
- 这项研究为增加可生物降解和回收塑料的利用提供了可行的途径,支持可持续制造和循环经济.
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