孙芳华,朱树琦,陈彦模,俞昊,朱美芳
SUN Fang-hua1,ZHU Shu-qi1,CHEN Yan-mo1,YU Hao2,ZHU Mei-fang1(1.State Key Lab for Modification of Chemical Fibers & Polymer Materials

• 1:纤维改性国家重点实验室
• 2:东华大学材料科学与工程学院

摘要(Abstract)：

将不同羟基戊酸(HV)含量的聚羟基丁酸-羟基戊酸共聚酯(PHBV)进行溶液共混,采用干法纺丝工艺获得PHBV共混纤维。通过SEM、DSC、XRD等仪器对所得纤维表面形态、热性能及力学性能随时间变化等进行了研究。结果表明,所得PHBV共混纤维表面有凹槽;随着共混HV含量的增高,PHBV共混纤维的熔点逐渐降低,结晶度逐渐减小;对于未经后处理的初生纤维,纺后4h内纤维的断裂伸长可达300%以上,断裂强度及断裂伸长也随着共混物中HV含量的增大而有所提高。通过共混降低了纤维脆性转变速率,为后续加工提供了性能良好的初生纤维。
The poly[hydroxybutyrate-co-hydroxyvalerate](PHBV) with a low hydroxyvalerate(HV) content(2 mol%) was modified by blending with PHBV with a high HV content in solution.The morphology and mechanical properties of the as-spun fiber by dry spinning was determined by scanning electron microscope(SEM),differential scanning calorimetry(DSC),X-ray diffration(XRD),and tensile measurements.The results showed that there were a few of flute-like lines parallel to the fiber axis on the surface of the as-spun fiber.With the increasing weight fraction of the high HV content blended,the melting temperature of the PHBV as-spun fibers decreased,the degree of crystallinity increased,the tensile strength and elongation tended increased.After aging at room temperature for at least 24 h,the elongation at break of the as-spun fibers was still more than 300 %.The as-spun fibers provided a good basis for post-processing.

关键词(KeyWords)： 聚羟基丁酸-羟基戊酸共聚酯;干法纺丝;初生纤维;力学性能
poly(hydroxybutyrate-co-hydroxyvalerate),dry spinning,as-spun fiber,mechanical property

Abstract:

Keywords:

基金项目(Foundation): 上海市曙光跟踪项目(项目编号06GG08);; 上海市基础研究重点项目(项目编号06JC14003)

作者(Author): 孙芳华,朱树琦,陈彦模,俞昊,朱美芳
SUN Fang-hua1,ZHU Shu-qi1,CHEN Yan-mo1,YU Hao2,ZHU Mei-fang1(1.State Key Lab for Modification of Chemical Fibers & Polymer Materials

DOI: 10.16090/j.cnki.hcxw.2010.07.005

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