中国塑料 ›› 2013, Vol. 27 ›› Issue (08): 21-26.DOI: 10.19491/j.issn.1001-9278.2013.08.004

• 材料与性能 • 上一篇    下一篇

枝化聚丁二酸丁二醇酯共聚物的合成及结晶性能研究

张瑜,齐治国,刘尊浩,唐一壬,曾一鸣,徐军,郭宝华*   

  1. 清华大学化工系,北京100084
  • 收稿日期:2013-04-12 修回日期:2013-05-24 出版日期:2013-08-26 发布日期:2020-11-16
  • 基金资助:
    国家高技术研究发展计划(863计划)重大项目(2011AA02A203)

Synthesis and Crystallization Properties Study of Branched Poly(butylene succinate) (PBS)

ZHANG Yu,QI Zhiguo,LIU Zunhao,TANG Yiren, ZENG Yiming,XU Jun,GUO Baohua*   

  1. Department of Chemical Engineering, Tsinghua University, Beijing 100084,China

  • Received:2013-04-12 Revised:2013-05-24 Online:2013-08-26 Published:2020-11-16

摘要: 采用丁二酸(SA)、1,4-丁二醇(BDO)及枝化单体正丁基缩水甘油醚(BGE)合成了不同枝化度的枝化聚丁二酸丁二醇酯(PBS-bge)共聚物,利用1H-NMR、XRD、DSC以及POM对枝化共聚物的化学组成及结晶性能进行了表征。结果表明,枝化单元的引入没有改变聚合物的晶型,但显著改变了其热力学性能,枝化PBS共聚物的熔点(Tm)、结晶度(Xc)均随枝化单体含量的增加逐渐降低。等温结晶结果显示相比纯PBS,枝化PBS共聚物的Avrami指数n有一定程度的降低。偏光显微镜结果显示,高的枝化度对结晶形貌,特别是环带的形貌有较大影响。

关键词: 枝化聚丁二酸丁二醇酯, 热学性能, 结晶, 合成

Abstract: Branched poly(butylene succinate) copolymers (PBS-bge) with different ratios of branch units were synthesized via polycondensation of succinic acid(SA), 1,4-butanediol(BDO), and butyl glycidyl ether(BGE) as the branch monomer. The compositions and crystallization properties of the resulted branched PBS were investigated by 1H-NMR, X-ray diffraction (XRD), differential scanning calorimetry (DSC), and polarizing optical microscope (POM). The results suggested that the crystal structure of the branched PBS copolymers hardly changed, but the thermodynamic properties were significantly changed from PBS. The melting temperature(Tm) and the degree of crystallinity(Xc) both decreased with the increase of the BGE units. Isothermal crystallization results showed that Avrami exponents (n) of the PBS-bge reduced to some extent compared with PBS. And the spherulitic morphologies, especially the banded spherulites were greatly affected when the BGE unit ratio was high.

Key words: branched poly(butylene succinate);thermal property, crystallization, synthesis

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