BDO 对高晶点 PBAT 性能改善的研究

Research on the Performance Improvement of High Crystallinity PBAT by BDO

摘要

本研究聚焦于利用1,4-丁二醇（BDO）共混改性改善高晶点聚己二酸/对苯二甲酸丁二酯（PBAT）的性能，特别是消除由于过度交联反应形成的晶点，提升PBAT的综合性能，优选出最佳的BDO添加量。试验结果表明，合适的BDO添加量在共混改性过程中可有效破坏大分子的缠结和微晶区，不仅了降低集中应力，而且改善了结晶的均匀性，最终协同优化了PBAT的拉伸强度、断裂伸长率、熔点、熔融指数等综合性能。本研究为提升PBAT的综合性能，减少成膜时的晶点提供了一种有效的改性途径。

Abstract

This study focuses on using 1,4-butanediol (BDO) blending modification to reduce the grain number of polybutylene terephthalate/butylene terephthalate (PBAT), particularly eliminating the gel point formed by excessive cross-linking reactions, thereby enhancing PBAT performance and optimizing the optimal BDO addition amount. Experimental results indicate that an appropriate BDO addition amount can effectively disrupt macromolecular entanglement and microcrystalline regions during blending modification, reduce stress concentration, improve crystalline uniformity, and ultimately synergistically optimize PBAT’s comprehensive properties such as tensile strength, elongation at break, and melting point. This study provides an effective modification approach to enhance PBAT performance and reduce the gel point during film formation.

关键词

PBAT / 共混改性 / 晶点 / 复合材料

Key words

PBAT / blending modification / crystal grains / composites

参考文献

[1] 杨帆, 吴宏, 马双翼, 彭江洪, 姜天伟, 孙闯闯. PBAT及其改性复合材料的研究进展与应用[J]. 广东化工, 2024, 51 (21): 17-19+76.

[2] 王翼嵩. 生物可降解聚酯PBAT链结构调控及性能研究[D]. 导师: 王文俊;李希.浙江大学, 2024.

[3] 陕洁, 朱桂丹, 齐艳杰, 吴霞, 牟芬. 聚对苯二甲酸己二酸-丁二醇酯的合成[J]. 塑料, 2024, 53 (03): 83-87+148.

[4] 兰光明, 刘建, 李平, 尚祖明. 一种PBAT树脂薄膜中高晶点的处理方法: 辽宁省, CN117645779A[P]. 2024-03-05.

基金资助

生物可降解材料关键技术开发与应用创新团队(2024DB011)