Melt flow and fiber properties of copolyesters
Melt flow and fiber properties of copolyesters
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共聚酯的熔体流动性和纤维性能
DOI：
10.1002/app.1987.070340403
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发表时间：
1987
影响因子：
3
通讯作者：
Luo Honglie
中科院分区：
文献类型：
--
作者：
Z. Hong;L. Shengping;Luo Honglie
研究了改性单体[3，5-二（乙氧羰基）苯磺酸钠]含量在1.5 ~ 4.5mol%范围内对可染碱性染料共聚酯（COPET）熔体流动性和纤维性能的影响。使用Instron毛细管流变仪在265、275和285°C下获得剪切速率范围为10至104 s-1的数据。COPET的流动性能作为温度，特性粘度，熔点和改性单体含量的函数进行了测定。通过测量收缩率、结晶度、双折射率、长周期、声速和分子链的静态柔性，研究了在80、110、130、150、175和200°C油和空气中退火的拉伸纤维。结果表明，COPET分子链中的大侧基SO_3Na使其链刚性和熔体粘度增加，结晶度和取向度降低。
The effect of modifying monomer [sodium 3,5-di(carbonethoxy)benzene sulfonate] contents range from 1.5 to 4.5 mol % on the melt flow and fiber properties of copolyesters (COPET) dyeable with basic dyes was investigated. An Instron capillary rheometer was used to obtain data over shear rates ranging from 10 to 104 s−1 at 265, 275, and 285°C. The COPET's flow properties as a function of temperature, inherent viscosity, melting point, and modifying monomer content were determined. The drawn fibers annealed in oil and air at 80, 110, 130, 150, 175, and 200°C were studied by means of measurements of shrinkage ratio, crystallinity, birefringence, long period, sonic rate, and static state flexibility of molecular chain. All these showed that the large side group, SO3Na in COPET molecular chains causes an increase in chain rigidity and melt viscosity, and a decrease in crystallinity and orientation.