生物可降解聚（3-羟基丁酸-co-3-羟基戊酸共聚酯）/聚乳酸共混物的相容性和结晶性

doi:10.13475/j.fzxb.20171001408

纺织学报 ›› 2018, Vol. 39 ›› Issue (08): 1-8.doi: 10.13475/j.fzxb.20171001408

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生物可降解聚（3-羟基丁酸-co-3-羟基戊酸共聚酯）/聚乳酸共混物的相容性和结晶性

收稿日期:2017-10-09 修回日期:2018-05-05 出版日期:2018-08-15 发布日期:2018-08-13

Miscibility and crystallization properties of biodegradable poly (3-hydrozybutyrate-co-3-hydroxyvalerate)/poly (lactic acid) blends

Received:2017-10-09 Revised:2018-05-05 Online:2018-08-15 Published:2018-08-13

摘要/Abstract

摘要：

针对聚（3-羟基丁酸-co-3-羟基戊酸共聚酯）（PHBV）热稳定性差、易分解的问题，通过与聚乳酸（PLA）采用熔融共混的方法制备了不同混合比例的的PHBV/PLA共混物，借助差示扫描量热仪、热重分析仪、动态热机械分析仪和X射线衍射仪研究了PHBV/PLA共混物的相容性、热学性能和结晶性等，并用热台偏光显微镜观察了PHBV/PLA共混物的动态热结晶过程。结果表明：PHBV/PLA共混物呈现分离的熔融温度和玻璃化转变温度，X射线衍射曲线上没有出现新的衍射峰，说明PHBV和PLA的相容性较差；PLA的加入提高了PHBV的热稳定性能，拓宽了PHBV的熔融加工窗口；随着共混物中PLA比例的增加，共混物的结晶相由“海-岛”相逐渐变成两聚合物分别连续成相。

关键词: 聚（3?羟基丁酸?ｃｏ?3?羟基戊酸共聚酯）, 聚乳酸, 共混, 相容性, 结晶性

Abstract:

In order to provide theoretical basis for preparation of poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/ poly(lactic acid) (PHBV/PLA) blend fibers, PHBV/PLA blends with different mass ratios were prepared by melt mixing. The differential scanning calorimetry, thermo-gravimetric analysis, dynamic mechanical analyzer, X-ray diffraction were used to analyze the compatibility, thermal stability and crystallization properties. The dynamic thermal crystallization process of PHBV/PLA blends was observed using a hot-stage polarized microscope. The results indicate that the compatibility between PHBV and PLA is poor on account of two distinct melting temperatures and glass transition temperature. No any new diffraction peaks appeared at X-ray diffraction curves of the blends. The added PLA improves the thermal stability of PHBV and broadened the melt processing window of PHBV. The crystalline phase transition of PHBV/PLA blends changes gradually from the sea-island phase to PHBV-continuous phase and PLA-continuous phase with the increase of PLA content.

Key words: poly (3-hydroxybutyrate-co-3-hydroxyvalerate, poly(lactic acid), melt mixing, miscibility, crystallization

赵作显洪剑寒严喆潘志娟. 生物可降解聚（3-羟基丁酸-co-3-羟基戊酸共聚酯）/聚乳酸共混物的相容性和结晶性[J]. 纺织学报, 2018, 39(08): 1-8.

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生物可降解聚（3-羟基丁酸-co-3-羟基戊酸共聚酯）/聚乳酸共混物的相容性和结晶性

Miscibility and crystallization properties of biodegradable poly (3-hydrozybutyrate-co-3-hydroxyvalerate)/poly (lactic acid) blends

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