多元环氧扩链剂（ADR）对PBAT的扩链改性及其耐老化性能的影响

doi:10.19491/j.issn.1001-9278.2020.03.006

中国塑料 ›› 2020, Vol. 34 ›› Issue (3): 33-39.DOI: 10.19491/j.issn.1001-9278.2020.03.006

多元环氧扩链剂（ADR）对PBAT的扩链改性及其耐老化性能的影响

舒梦莹¹,翁云宣¹^,²∗,张彩丽¹^,²

（1.北京工商大学材料与机械工程学院, 北京 100048；2.塑料卫生与安全质量评价技术北京市重点实验室, 北京100048）

收稿日期:2019-12-02 修回日期:2020-02-07 出版日期:2020-03-26 发布日期:2020-03-26
基金资助:
基金项目:国家自然基金项目（51773005）

Influence of Multi?component Epoxy Chain?Extension Agent on Aging Resistance of Chain?Extension Modified PBAT

SHU Mengying¹, WENG Yunxuan¹^,²∗, ZHANG Caili¹^,²

(1.School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China； 2.Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics， Beijing 100048， China)

Received:2019-12-02 Revised:2020-02-07 Online:2020-03-26 Published:2020-03-26
Contact: Yunxuan Weng E-mail:wyxuan@th.btbu.edu.cn

摘要/Abstract

摘要： 将多元环氧扩链剂（ADR）在双螺杆中对聚对苯二甲酸?己二酸丁二酯（PBAT）进行挤出扩链反应改性，研究了添加不同含量ADR对PBAT端羧基含量、相对分子质量、力学性能、结晶度及色度的影响，并采用氙灯老化实验研究了老化时间对添加不同含量ADR的PBAT力学性能与相对分子质量的影响。结果表明，经ADR扩链后，PBAT的端羧基含量下降，力学性能和相对分子质量提高；当ADR添加量为1 %时，PBAT的端羧基含量下降尤为显著，从23.3 mol/t下降至13.8 mol/t，相对分子质量、结晶温度和力学性能有所提高；当ADR添加量为1 %时，样品的力学性能最优，在老化期间断裂伸长率高于其他样品，并且化学结构和相对分子质量体现出的耐老化性能较优，老化期间的相对分子质量始终高于其他样品。

Abstract: Poly (ethylene terephthalate?butylene adipate) (PBAT) was modified by chain?extension reaction extrusion in a twin?screw extruder using a multi?component epoxy chain extender (ADR), and the effects of the addition amount of ADR on the content of terminal carboxyl groups, relative molecular weight, mechanical properties, crystallinity and color of PBAT were investigated. The results indicated that the terminal carboxyl group content of PBAT was reduced after the chain extension, and its mechanical properties and relative molecular weight were improved. The terminal carboxyl group content of PBAT decreased significantly from 23.3 mol/t to 13.8 mol/t when 1 wt% of ADR was added, and its relative molecular weight, crystallization temperature, and mechanical properties were also improved. Moreover, the maximum mechanical properties were achieved for PBAT when 1 wt% of ADR was added, and its elongation at break was higher than those of the other samples during the aging process. In addition, the PBAT after chain extension exhibited better aging resistance in view of its chemical structure as well as the relative molecular weight higher than the other samples during the aging process.

舒梦莹, 翁云宣, 张彩丽. 多元环氧扩链剂（ADR）对PBAT的扩链改性及其耐老化性能的影响[J]. 中国塑料, 2020, 34(3): 33-39.

SHU Mengying, WENG Yunxuan, ZHANG Caili. Influence of Multi?component Epoxy Chain?Extension Agent on Aging Resistance of Chain?Extension Modified PBAT[J]. China Plastics, 2020, 34(3): 33-39.

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多元环氧扩链剂（ADR）对PBAT的扩链改性及其耐老化性能的影响

Influence of Multi?component Epoxy Chain?Extension Agent on Aging Resistance of Chain?Extension Modified PBAT

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