对可生物降解的聚乙烯糖酸-co-terephthalate和聚乙烯脂肪酸-co-terephthalate共聚的结晶的比较研究
Pengkai Qin1,2, Linbo Wu1,2
1Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
Polymers
|September 14, 2024
概括
由于链流动性较弱,与聚乙烯酸盐-联合甲酸盐 (PBAT) 相比,聚乙烯酸盐-联合甲酸盐 (PBST) 的融化结晶和可加工性降低. 这影响了它的应用程序开发.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 聚乙烯 (PBST) 是一种可生物降解的共聚,具有有前途的特性.
- PBST的热力/机械性能和气体屏障性能优于聚乙烯基酸盐-联合甲酸盐 (PBAT).
- 然而,PBST表现出较低的融可加工性,阻碍了其更广泛的应用.
研究的目的:
- 为了研究PBST在快速冷却条件下的融化结晶行为.
- 为了比较PBST与PBAT的融化结晶.
- 了解影响PBST处理能力的结构-属性关系.
主要方法:
- 合成了PBST (PBST48,PBST44) 和PBAT (PBAT48) 的样本.
- 在不同的冷却速率 (10°C/分钟,40°C/分钟) 和同热条件下对融化结晶行为的比较分析.
- 评估机械性能 (拉伸模量) 和光学性能 (光传导率).
主要成果:
- 在缓慢冷却速度 (10°C/分钟) 下,PBST的结晶度与PBAT相似,但在快速冷却 (40°C/分钟) 下,性能明显差.
- 在快速冷却下,PBST44完全失去了融结晶的能力.
- 与PBAT相比,PBST显示出更高的拉力模量和光传导率.
结论:
- 在PBST中较弱的链流动性,归因于其较短的酸盐部分,是其较差的结晶和加工能力的原因.
- 了解这些结晶行为对于优化PBST处理和扩展其应用至关重要.
- 尽管存在处理方面的挑战,但PBST的增强机械和光学性能表明在特定的高性能应用中存在潜力.
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