生物可降解PBS聚酯合金的制备与性能调控

doi:10.11896/cldb.20090030

材料导报

2021, Vol. 35

Issue (22): 22151-22159 https://doi.org/10.11896/cldb.20090030

高分子与聚合物基复合材料

生物可降解PBS聚酯合金的制备与性能调控

姜英勇^1,2, 任亮^1,2, 任重³, 李文博^1,2, 帅嘉欣^1,2, 张明耀^1,2, 张会轩^1,2

1 长春工业大学高分子材料合成与应用技术国家地方联合工程实验室,长春 130012
2 长春工业大学化学工程学院,长春 130012
3 长春中医药大学附属医院,长春 130021

Preparation and Performance Control of Biodegradable PBS Polyester Alloy

JIANG Yingyong^1,2, REN Liang^1,2, REN Zhong³, LI Wenbo^1,2, SHUAI Jiaxin^1,2, ZHANG Mingyao^1,2, ZHANG Huixuan^1,2

1 National Engineering Laboratory for Polymer Materials Synthesis and Application Technology, Changchun University of Technology, Changchun 130012, China
2 School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China
3 The Affiliated Hospital of Changchun University of Chinese Medicine, Changchun 130021, China

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摘要聚丁二酸丁二醇酯(PBS)因具有完全的生物可降解性、无毒无害等优点成为了近年来研究的热点。但是由于PBS的结晶速率低、韧性较差等不足限制了其进一步深入与广泛的应用。本工作在不牺牲PBS生物可降解性的前提下,针对其韧性不足等缺点采用化学接枝与物理共混相结合的方法对PBS进行了增韧改性。采用聚己二酸-对苯二甲酸丁二酯(PBAT)与经甲基丙烯酸缩水甘油酯(GMA)接枝改性后的PBS进行熔融共混制备了一系列具有高韧性的PBS聚酯合金,研究了PBS聚酯合金中PBAT含量对其微观结构、力学性能、热性能、结晶性能以及加工性能的影响。结果表明:随着PBAT含量的增加,聚酯合金受到外力作用时的剪切形变行为愈发明显,材料的断裂行为由脆性断裂转为韧性断裂;聚酯合金中PBAT含量为30%(质量分数,下同)时,综合性能最好。随着PBAT含量的增加,聚酯合金的结晶焓、熔融焓下降,结晶度逐渐降低,在合金中PBAT含量为50%时,聚酯合金的结晶度为29.51%,相比纯PBS下降了39%,同时PBAT的加入也使得合金的玻璃化转变温度下降。对材料的流变行为分析表明,在加入PBAT后聚酯合金的熔体强度得到了较大的提升,加工成型性能也得到了明显的改善。PBAT使PBS聚酯合金韧性得到了较大的提升,随着合金中PBAT含量的增加,材料的缺口冲击强度逐渐上升,拉伸强度逐渐下降,断裂伸长率先升高后降低。在PBAT含量为30%时,材料的断裂伸长率为687%,相比纯PBS提升了136%;缺口冲击强度在PBAT含量为50%时达到397 J/m,相比纯PBS增加了892.5%。同时将其与未进行接枝改性的PBS/PBAT合金的各项性能进行了对比,发现经过接枝改性后的PBS-g-GMA与PBAT的相容性得到了提升。

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关键词: 聚丁二酸丁二醇酯聚己二酸-对苯二甲酸丁二酯聚酯合金生物可降解增韧改性加工性能

Abstract: Poly(butylene succinate) (PBS) has become a research hotspot in recent years due to its complete biodegradability, non-toxic and harmless advantages. However, its further application is limited due to the low crystallization rate and poor toughness. In this research, PBS was modified by chemical grafting and physical blending to improve its toughness without sacrificing the biodegradability. PBS polyester alloys with higher toughness were prepared by melt blending of poly(butylene adipate-co-terephthalate) (PBAT) and modified PBS with glycidyl methacrylate (GMA). The effects of PBAT content on mechanical properties, thermal properties, crystallization properties, microstructure and processability of PBS polyester alloys were studied in this research. The results showed that with the increase of PBAT content, the shear deformation behavior of polyester alloy under external force was more obvious, and the fracture behavior of the material changed from brittle fracture to ductile fracture. And the comprehensive performance of PBS polyester alloy was the best when the content of PBAT in alloy was 30% (mass fraction). With the increase of PBAT content in the polyester alloy, the crystallization enthalpy, melting enthalpy and crystallinity of alloy decreased, and when the content of PBAT in the alloy reached to 50%, the crystallinity of polyester alloy was the value of 29.51%, which was 39% lower than pure PBS, meanwhile the glass transition temperature of the alloy also decreased. The melt strength of the alloy was greatly improved by the introduction of PBAT; in other words, the processing performance of the alloy was enhanced obviously. It was evidently found that the addition of PBAT led to the better toughness of PBS polyester alloy. With the increase of PBAT content in the alloy, the notched impact strength increased gradually, the tensile strength decreased rapidly, and the elongation at break of alloy increased first and then decreased. The elongation at break was 687% when the content of PBAT was 30%, which was 136% higher than pure PBS; and the notched impact strength of the alloy was 397 J/m when content of PBAT was 50%, which was 892.5% higher than pure PBS. The grafted PBS-g-GMA and PBAT alloys were also compared with the non-grafted PBS/PBAT alloys, which showed that the compatibility between PBS-g-GMA and PBAT was improved after grafting.

Key words: poly(butylene succinate) poly(butylene adipate-co-terephthalate) polyester alloy biodegradable toughening modification processability

出版日期: 2021-11-25 发布日期: 2021-12-13

ZTFLH:

TQ323

通讯作者: renl@ccut.edu.cn; zmy@ccut.edu.cn

作者简介: 姜英勇,2020年6月毕业于长春工业大学,获理学硕士学位。现为长春工业大学材料科学与工程学院博士研究生。主要研究方向为生物基高分子材料。
任亮,长春工业大学副教授,博士研究生导师,北京大学访问学者。2011年6月毕业于吉林大学高分子化学与物理专业,获理学博士学位。研究兴趣:(1)高分子材料强韧化;(2)有机无机纳米杂化材料的制备与性能;(3)聚合物基复合材料结构设计与制备;(4)生物基高分子材料。在国内外重要期刊发表文章20余篇,申报发明专利20余项。
张明耀,长春工业大学教授,博士研究生导师,吉林省高级专家,吉林省“长白山学者”特聘教授。2003年9月毕业于东北大学材料学专业,获工学博士学位。主要研究方向为:(1)微纳尺寸粒子制备化学;(2)通用高分子材料高性能化;(3)多相多组分高分子材料结构设计与制备。在国内外期刊发表研究论文70余篇,获授权国家发明专利10余项目。

引用本文:

姜英勇, 任亮, 任重, 李文博, 帅嘉欣, 张明耀, 张会轩. 生物可降解PBS聚酯合金的制备与性能调控[J]. 材料导报, 2021, 35(22): 22151-22159.
JIANG Yingyong, REN Liang, REN Zhong, LI Wenbo, SHUAI Jiaxin, ZHANG Mingyao, ZHANG Huixuan. Preparation and Performance Control of Biodegradable PBS Polyester Alloy. Materials Reports, 2021, 35(22): 22151-22159.

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http://www.mater-rep.com/CN/10.11896/cldb.20090030 或 http://www.mater-rep.com/CN/Y2021/V35/I22/22151

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