乙交酯-L-丙交酯共聚物纤维非晶区取向的声速法表征

纺织学报 ›› 2007, Vol. 28 ›› Issue (11): 9-12.

乙交酯-L-丙交酯共聚物纤维非晶区取向的声速法表征

李健;黄庆;李鑫;袁晓燕

天津大学材料科学与工程学院

收稿日期:2006-12-05 修回日期:2007-02-13 出版日期:2007-11-15 发布日期:2007-11-15
通讯作者: 李健

Characterization of amorphous orientation of ply(glycolide-co-L-lactide) fiber by sonic velocity

LI Jian1;HUANGQing2;LI Xin2;YUAN Xiaoyan

Received:2006-12-05 Revised:2007-02-13 Online:2007-11-15 Published:2007-11-15
Contact: LI Jian

摘要/Abstract

摘要： 采用DSC、WAXD 和声速等方法对物质的量比约为90∶10 的乙交酯2L2丙交酯共聚物(PGLA910) 纤维非晶区取向函数的表征进行了研究。纤维经拉伸和充分的热定型,其DSC 和WAXD 的结果表明,PGLA910 中只有PGA 部分发生了结晶。通过测定结晶度为5 %~30 %的纤维声速,计算出声模量,按照聚合物纤维两相模型得出PGLA910的晶区和非晶区特征横向模量分别为E0t , c = 9135 GPa , E0t , am = 3. 21 GPa。根据此特征值,计算出不同样品的非晶区取向函数。对不同拉伸工艺条件下7 种样品的热收缩测定发现,纤维的非晶区取向函数与热收缩率之间有较好的线性关系,证实了该方法是可靠的。

Abstract: The amorphous orientation of poly (glycolide2co2L2lactide) fiber with 90 :10 mole ratio of glycolide
to L2lactide (PGLA910) was studied by differential scanning calorimeter (DSC) , wide angle X2ray diffraction
(WAXD) and the sonic velocity method. The crystallization in PGLA910 came only from PGA according to the
DSC and WAXD results of the drawn and annealed fiber. The sonic modulus was computed through
determining the sonic velocity of PGLA910 fiber with crystallinity from about 5 % to 30 % , and the intrinsic
transverse modul in the amorphous region and the crystalline region were E0
t , c = 9135 GPa and E0
t , am =
3. 21 GPa respectively obtained based on the two2phase model . The amorphous orientations of 7 drawn PGLA
fibers had a linear relationship with the thermo2shrinkages and indicated the characterization was reasonable.

李健;黄庆;李鑫;袁晓燕. 乙交酯-L-丙交酯共聚物纤维非晶区取向的声速法表征[J]. 纺织学报, 2007, 28(11): 9-12.

LI Jian;HUANGQing;LI Xin;YUAN Xiaoyan. Characterization of amorphous orientation of ply(glycolide-co-L-lactide) fiber by sonic velocity[J]. JOURNAL OF TEXTILE RESEARCH, 2007, 28(11): 9-12.

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