中国塑料

中国塑料 ›› 2016, Vol. 30 ›› Issue (10): 42-49 .DOI: 10.19491/j.issn.1001-9278.2016.10.008

• 材料与性能 • 上一篇    下一篇

端环氧型超支化聚酯对聚（3-羟基丁酸戊酸共聚酯）的改性研究

张静,靳玉娟,翁云宣,王娥娥   

  1. 北京工商大学
  • 收稿日期:2016-08-10 修回日期:2016-09-09 出版日期:2016-10-26 发布日期:2016-10-26

Study on Modification of Poly(hydroxybutyrate-co-hydroxyvalerate) with Epoxy-terminated Hyperbranched Polyester

  • Received:2016-08-10 Revised:2016-09-09 Online:2016-10-26 Published:2016-10-26

摘要： 以2,2二羟甲基丙酸（DMPA）和三羟甲基丙烷（TMP）为原料，以对甲苯磺酸（P-TSA）为催化剂，通过“一步法”合成三代超支化聚酯（HBPE），然后采用环氧氯丙烷对HBPE进行改性，得到了具有端环氧基的三代超支化聚酯（EHBP-G3）目标产物，最后采用熔融共混法制备了EHBP改性的聚（3-羟基丁酸酯-co-3羟基戊酸酯）（PHBV）树脂；通过差示扫描量热仪、偏光显微镜、力学性能和熔体流动速率等分析方法对制备的PHBV/EHBP共混物进行表征。结果表明，加入1.5 %(质量分数，下同)三代超支化聚酯（EHBP-G3）时，PHBV/EHBP共混物的结晶度下降了16.1 %，冲击强度提高了34.3 %。

关键词: 超支化聚酯, 聚（3羟基丁酸酯-co-3羟基戊酸酯）, 共混, 改性

Abstract: Hyperbranched polyester (HBPE) was synthesized through a “one-step” process by using 2,2dimethylol propionic acid and trimethylolpropane as raw materials and ptoluene sulfonic acid as a catalysts. The epoxyterminated HBPE with three generations (EHBP-G3) was prepared through the modification of HBPE with epichlorohydrin. The poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV)/EHBP blends were prepared through a melt processing method and then characterized by differential scanning calorimetry (DSC), polarizing microscopy, and mechanical and rheological evaluations. The results indicated that the degree of crystallinity of PHBV decreased by 16.1 % with addition of 1.5 wt% of EHBP-G3, and meanwhile, its impact strength increased by 34.28 %. The reduction in crystallinity may lead to an improvement in impact toughness for PHBV/EHBP blends.

Key words: hyperbranched polyester, poly(hydroxybutyrate-co-hydroxyvalerate), blending, modification

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