中国塑料 ›› 2022, Vol. 36 ›› Issue (9): 24-31.DOI: 10.19491/j.issn.1001-9278.2022.09.004

• 材料与性能 • 上一篇    下一篇

生物基工程聚酯弹性体对聚(3⁃羟基丁酸酯⁃co⁃3⁃羟基戊酸酯)的增韧改性研究

黄嘉伟1, 韩小龙1, 吴悠1, 靳玉娟1(), 王朝2()   

  1. 1.北京工商大学化学与材料工程学院,北京 100048
    2.北京化工大学有机无机复合材料国家重点实验室,北京 100029
  • 收稿日期:2022-05-24 出版日期:2022-09-26 发布日期:2022-09-26
  • 通讯作者: 靳玉娟(1983—),女,教授,从事生物基与降解高分子材料的改性、应用及评价工作,jinyujuan@th.btbu.edu.cn
    王朝(1982—),男,教授,从事生物基弹性体的设计、合成与性能研究,wangzhao@mail.buct.edu.cn
    E-mail:jinyujuan@th.btbu.edu.cn;wangzhao@mail.buct.edu.cn

Toughening modification of poly (3⁃hydroxybutyrate⁃co⁃3⁃hydroxyvalerate) by bio⁃based engineering polyester elastomer

HUANG Jiawei1, HAN Xiaolong1, WU You1, JIN Yujuan1(), WANG Zhao2()   

  1. 1.College of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China
    2.State Key Laboratory of Organic?Inorganic Composites,Beijing University of Chemical Technololgy,Beijing 100029,China
  • Received:2022-05-24 Online:2022-09-26 Published:2022-09-26
  • Contact: JIN Yujuan, WANG Zhao E-mail:jinyujuan@th.btbu.edu.cn;wangzhao@mail.buct.edu.cn

摘要:

针对聚(3⁃羟基丁酸酯⁃co⁃3⁃羟基戊酸酯)(PHBV)的晶体尺寸大、结晶度高、呈脆性等问题对其进行增韧改性,通过熔融共混法在PHBV中添加生物基工程聚酯弹性体(BEPE),制备了PHBV/BEPE共混物,经过测试流变性能、结晶性能、力学性能、热性能及微观形貌,对共混物的结构和性能进行分析和研究。结果表明,PHBV与BEPE之间的氢键作用、链缠结作用以及相似的主链结构使二者有更好的相容性和分散性,还可使PHBV球晶数量增多,球晶尺寸减小;当添加30 %(质量分数,下同)BEPE时共混物的断裂伸长率和冲击强度最高,分别较PHBV提高了589.2 %和149.4 %;BEPE使共混物的结晶度逐渐降低;添加BEPE样品的冲击断面逐渐粗糙,发生了脆韧转变。

关键词: 聚(3?羟基丁酸酯?co?3?羟基戊酸酯), 生物基工程聚酯弹性体, 增韧, 增容, 结晶, 脆韧转变

Abstract:

In this paper, the properties of poly(3⁃hydroxybutyrate⁃co⁃3⁃hydroxyvalerate) PHBV/bio⁃based engineering polyester elastomer (BEPE) compounds were studied through analyzing their rheological properties, crystallization properties, mechanical properties, thermal properties, and microstructure. The results indicated that the number of PHBV spherulites increased along with a decrease in their size due to the hydrogen bonding, chain entanglement, and similar main chain structures between PHBV and BEPE, resulting in better compatibility and dispersion. When 30 wt% BEPE was added, the compounds achieved maximum elongation at break and impact strength, increasing by 589.2 % and 149.4 %, respectively, compared to pure PHBV. The crystallinity of the compounds decreased with the addition of BEPE, and their impact fracture surface tended to be rough along with a “brittle⁃ductile” transition according to the morphological observation.

Key words: poly(3?hydroxybutyrate?co?3?hydroxyvalerate), bio?based engineering polyester elastomer, toughening, compatibilization, crystallization, brittle?ductile transition

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