中国塑料 ›› 2024, Vol. 38 ›› Issue (11): 64-69.DOI: 10.19491/j.issn.1001-9278.2024.11.011

• 材料与性能 • 上一篇    下一篇

癸二酸二苯基二酰肼调控扩链改性聚乳酸的性能

王澳华1,2, 顿东星2, 孟瑞静2, 张玉霞1,2()   

  1. 1.北京工商大学中国轻工业聚合物发泡材料加工与应用重点实验室,北京 100048
    2.北京工商大学轻工科学与工程学院,北京 100048
  • 收稿日期:2024-05-24 出版日期:2024-11-26 发布日期:2024-11-21
  • 通讯作者: 张玉霞(1965—),女,副教授,从事高性能塑料薄膜、聚烯烃发泡材料及可生物降解塑料等研究,zhangyux@th.btbu.edu.cn
    E-mail:zhangyux@th.btbu.edu.cn
  • 基金资助:
    ] 钟文发.非线性规划在可燃毒物配置中的应用[C]// 赵玮.运筹学的理论与应用:中国运筹学会第五届大会论文集.西;例[1] 王权,瞿金平. 动态成型过程中PP/CaCO3 填充体系的流变行为[J]. 高分子材料科学与工程,2007,23:176?179

Study on performance regulation of chain⁃extended poly(lactic acid) foams with diphenylhydrazide sebacic acid

WANG Aohua1,2, DUN Dongxing2, MENG Ruijing2, ZHANG Yuxia1,2()   

  1. 1.China Key Laboratory of Polymer Foam Processing and Application in Light Industry,Beijing Technology and Business University,Beijing 100048,China
    2.School of Light Industry Science and Engineering,Beijing Technology and;Business University,Beijing 100048,China
  • Received:2024-05-24 Online:2024-11-26 Published:2024-11-21
  • Contact: ZHANG Yuxia E-mail:zhangyux@th.btbu.edu.cn

摘要:

使用成核剂癸二酸二苯基二酰肼(ST⁃NAB3)调控扩链剂苯乙烯⁃丙烯腈⁃甲基丙烯酸缩水甘油酯(SAG)改性聚乳酸(PLA)化学接枝产物(C⁃PLA)的性能,并采用超临界CO2制备了C⁃PLA⁃ST⁃NAB3发泡材料。利用偏振光学显微镜和差示扫描量热仪(DSC)、旋转流变仪、扫描电子显微镜(SEM)分别研究了不同ST⁃NAB3含量的C⁃PLA结晶性能、热性能、流变性能和发泡材料的微观结构。结果表明,ST⁃NAB3的加入能够显著提高C⁃PLA的结晶速率,减小晶体尺寸,同时增大晶体密度。随着ST⁃NAB3含量的增加,C⁃PLA的结晶度由3.2 %提高到20.2 %,其含量为0.3 %(质量分数,下同)和0.4 %时,在不同发泡温度下均能制得泡孔尺寸均一的C⁃PLA⁃ST⁃NAB3发泡材料。

关键词: 聚乳酸, 癸二酸二苯基二酰肼, 发泡材料, 结晶性能, 泡孔结构

Abstract:

In this study, diphenylhydrazide sebacic acid (ST⁃NAB3) was used to regulate the properties of a chemical graft product (C⁃PLA) obtained from the chain⁃extension modification of polylactic acid (PLA) using styrene⁃acrylonitrile⁃glycidyl methacrylate (SAG) a chain extender. Then, C⁃PLA⁃ST⁃NAB3 foams were prepared by using supercritical CO2, and their crystallization performance, thermal performance, rheological behavior, foaming properties, and microstructure were investigated by polarization light microscopy, differential scanning calorimetry, rotational rheometer, and scanning electron microscopy. The results indicated that the addition of ST⁃NAB3 increased the crystallization rate of C⁃PLA foams significantly, resulting in a reduction in the crystal size but an increase in the crystal density. With an increase in the ST⁃NAB3 content, the crystallinity degree of the C⁃PLA foam increased from 3.2 % to 20.2 %. When the content of ST⁃NAB3 was 0.3 and 0.4 wt%, the C⁃PLA⁃ST⁃NAB3 foams with a uniform cell size could be formed at different foaming temperature.

Key words: poly(lactic acid), diphenylhydrazide sebacic acid, foaming material, crystallization performance, cell structure

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