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中国塑料 ›› 2024, Vol. 38 ›› Issue (11): 14-20.DOI: 10.19491/j.issn.1001-9278.2024.11.003
收稿日期:
2024-02-23
出版日期:
2024-11-26
发布日期:
2024-11-21
通讯作者:
孟鑫(1978—),女,副教授,从事基于添加剂和聚合物拓扑结构设计的降解材料性能调控,mengxin@ecust.edu.cn
WEN Wei1, GONG Weiguang2, MENG Xin1()
Received:
2024-02-23
Online:
2024-11-26
Published:
2024-11-21
Contact:
MENG Xin
E-mail:mengxin@ecust.edu.cn
摘要:
设计合成了环氧基取代的聚硅氧烷(PESQ),以0.5 %,1.0 %,2.0 %及4.0 %(质量分数,下同)的浓度与聚乙交酯(PGA)熔融混合,通过对PESQ改性PGA的流变性能、水解性能及结晶性能进行表征,揭示了PESQ改性对PGA带来的影响。结果表明,PESQ以扩链的形式与PGA进行结合,提高PGA复黏度的同时促使其疏水性能的提升,进而改善PGA的水解性能,使得其水解10 d之后的质量损失下降21.1 %。此外,PESQ还能促进PGA的结晶,随着PESQ添加量的增加,PGA的结晶温度最高可增至179.5 ℃,相比于纯PGA的结晶温度172.7 ℃提升了6.8 ℃,并且结晶初期的活化能降低,说明PESQ起到了异相成核的作用。
中图分类号:
闻薇, 公维光, 孟鑫. 环氧基聚硅氧烷调控制备耐水解结晶聚乙交酯的研究[J]. 中国塑料, 2024, 38(11): 14-20.
WEN Wei, GONG Weiguang, MENG Xin. Controllable preparation of hydrolysis⁃resistant crystalline poly(glycolic acid) using poly(epoxypropoxy) silsesquioxane[J]. China Plastics, 2024, 38(11): 14-20.
样品 | 结晶峰温度/℃ | 结晶焓/J·g-1 | 低温熔融峰温度/℃ | 高温熔融峰温度/℃ | 二次熔融焓/J·g-1 | 结晶度/% |
---|---|---|---|---|---|---|
PGA | 172.7 | 80.8 | — | 221.3 | 84.6 | 46.2 |
PGA/0.5PESQ | 175.9 | 84.0 | 208.0 | 221.5 | 86.4 | 47.2 |
PGA/1PESQ | 177.8 | 86.7 | 208.5 | 221.2 | 87.2 | 47.6 |
PGA/2PESQ | 179.4 | 87.5 | 208.9 | 221.1 | 88.6 | 48.4 |
PGA/4PESQ | 179.5 | 93.3 | 209.2 | 221.4 | 90.1 | 49.2 |
样品 | 结晶峰温度/℃ | 结晶焓/J·g-1 | 低温熔融峰温度/℃ | 高温熔融峰温度/℃ | 二次熔融焓/J·g-1 | 结晶度/% |
---|---|---|---|---|---|---|
PGA | 172.7 | 80.8 | — | 221.3 | 84.6 | 46.2 |
PGA/0.5PESQ | 175.9 | 84.0 | 208.0 | 221.5 | 86.4 | 47.2 |
PGA/1PESQ | 177.8 | 86.7 | 208.5 | 221.2 | 87.2 | 47.6 |
PGA/2PESQ | 179.4 | 87.5 | 208.9 | 221.1 | 88.6 | 48.4 |
PGA/4PESQ | 179.5 | 93.3 | 209.2 | 221.4 | 90.1 | 49.2 |
样品 | 结晶速率/℃·min-1 | 结晶峰温度/℃ | 半结晶时间/s |
---|---|---|---|
PGA | 2.5 | 184.3 | 884.2 |
5.0 | 179.3 | 585.8 | |
10.0 | 173.1 | 179.0 | |
20.0 | 165.2 | 32.7 | |
30.0 | 159.4 | 25.8 | |
PGA/4PESQ | 2.5 | 190.5 | 383.3 |
5.0 | 185.8 | 89.8 | |
10.0 | 180.0 | 41.4 | |
20.0 | 173.0 | 21.7 | |
30.0 | 167.4 | 23.5 |
样品 | 结晶速率/℃·min-1 | 结晶峰温度/℃ | 半结晶时间/s |
---|---|---|---|
PGA | 2.5 | 184.3 | 884.2 |
5.0 | 179.3 | 585.8 | |
10.0 | 173.1 | 179.0 | |
20.0 | 165.2 | 32.7 | |
30.0 | 159.4 | 25.8 | |
PGA/4PESQ | 2.5 | 190.5 | 383.3 |
5.0 | 185.8 | 89.8 | |
10.0 | 180.0 | 41.4 | |
20.0 | 173.0 | 21.7 | |
30.0 | 167.4 | 23.5 |
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