中国塑料

中国塑料 ›› 2008, Vol. 22 ›› Issue (06): 44-48 .DOI: 10.19491/j.issn.1001-9278.2008.06.010

• 材料与性能 • 上一篇    下一篇

PHBV /PBAT共混物形态与性能研究

欧阳春发，贾润萍，王霞，马丕明，张勇   

  1. 1.上海应用技术学院材料工程系，上海200235: 2.上海交通大学高分子材料研究所，上海200240
  • 收稿日期:2008-01-23 修回日期:1900-01-01 出版日期:2008-06-25 发布日期:2008-06-25

Morphology and Properties of PHBV / PBAT Blends

OUYANG Chun-fa，JIA Run-ping，WANG Xia，MA Pi-ming，ZHANG Yong   

  1. 1 .Department of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 200235,China; 2. Research Institute of Polymer Materials, Shanghai Jiaotong University, Shanghai 200240,China
  • Received:2008-01-23 Revised:1900-01-01 Online:2008-06-25 Published:2008-06-25
  • Contact: OUYANG Chun-fa

摘要： 通过熔融共棍的力一法制备了完全生物降解的经基丁酸一经基戊酸共聚物/丁二醇一已二酸一对苯二甲酸共聚物共混材料(PHBV/PBAT)，研究了PHBV/PEAT共棍物的相形态、力学性能和热性能。结果表明，PEAT为50%(质量含量，下同)时，共棍物断裂伸长率为55 %，缺口冲击强度为542J/m，分别为改性前PHBV的19倍和22.6倍，显著提高了PHBV的韧性。SEM照片显示,30%的PEAT以分散相存在PHBV基体中;当PEAT超过50%，后，PEAT可能形成连续相，在受到外力过程中发生大形变从而吸收较多的能量。DSC研究表明，PEAT的加入抑制了PHBV的结晶过程，使PHBV结晶温度降低20一40℃。

关键词: 经基丁酸一经基戊酸共聚物, 丁二醇一已二酸一对苯二甲酸共聚物, 相形态, 力学性能, 生物降解

Abstract: Biodegradable poly(hydroxybutyrate-co一hyd roxyvalerate)/poly(butylene adipate-co一terephthalate)(PHBV /PBAT)blends were prepared via melting blending.Morphologies, mechanical and thermal properties of the blends were studied. The elongation at break and notched Izod impact strength of PHBV/PBAT blend reached 55 % and 542J/m, 19 and 22.6 times that of neat PHBV, respective1y. Scanning electronic microscopy(SEM) indicated that PBAT constituted dispersed phase in the PHBV /PBAT blends when its weight fraction below 50 wt，at which a phase inversion occurred. Differential Scanning Calorimetry (DSC) suggested that the crystallization temperatures of PHBV in PHBV/PBAT blends were 20一40℃lower than those of neat PHBV due to the inhibition effect of PBAT.

Key words: poly(hydroxybutyrate-co一hyd roxyvalerate), poly(butylene adipate-co一terephthalate), phase morphology, mechanical property, biodegradation

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