Effect of coagulation temperature on structures and properties of poly(p-phenylene benzobisoxazole) (DHPBO) fibers during dry-jet wet-spinning process

Effect of coagulation temperature on structures and properties of poly(p-phenylene benzobisoxazole) (DHPBO) fibers during dry-jet wet-spinning process
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干喷湿纺过程中凝固温度对聚对亚苯基苯并双恶唑(DHPBO)纤维结构和性能的影响

DOI:
10.1007/s11431-009-0098-0
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发表时间:
2009-03
期刊:
Science in China Series E-Technological Sciences
影响因子:
--
通讯作者:
Hu DaYong
Hu DaYong
中科院分区:
其他
文献类型:
--
作者:
Jiang JianMing;Zhang Tao;Yang ShengLin;Jin JunHong;Li Guang;Hu DaYong

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研究了干喷湿纺过程中凝固温度对二羟基聚对亚苯基苯并二恶唑(DHPBO)纤维形貌、微观结构和力学性能的影响,其中凝固浴浓度和拉伸比分别为PPA水溶液的10 wt%和1.7。通过 FTIR、XRD、SEM 和单纤维拉伸测试对初生 DHPBO 纤维的结构和机械性能进行了表征。结果表明,在PPA/H2O凝固体系中,当凝固温度为25℃时,可以得到高度结晶的DHPBO初生纤维,其晶粒细小,形貌圆形光滑,力学性能优良。
The effect of coagulation temperature on the morphology, microstructures and mechanical properties of dihydroxy poly(p-phenylene benzobisoxazole) (DHPBO) fibers was investigated during dry-jet wet-spinning process, in which the coagulation bath concentration and drawn ratio were kept as 10 wt% of PPA in water and 1.7, respectively. The structures and mechanical properties of the as-spun DHPBO fibers were characterized by FTIR, XRD, SEM, and single fiber tensile testing. The results indicated that in PPA/H2O coagulation system, when the coagulation temperature was 25°C, highly crystallized DHPBO as-spun fibers possessing fine crystallites, circular and smooth morphology, and excellent mechanical properties could be achieved.
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