PA6切片加工过程中晶体结构转变的研究  

Crystal structure transformation of PA6 chip during processing

作　　者：薛东 刘国 雷建龙 陶春立 

机构地区：[1]江阴市强力化纤有限公司,江苏江阴214426

出　　处：《合成纤维工业》2015年第1期41-43,49,共4页China Synthetic Fiber Industry

摘　　要：采用差示扫描量热仪和X射线衍射仪分析了不同生产厂家的聚己内酰胺(PA6)切片在纺丝过程中晶型的变化。结果表明:由于生产工艺以及聚合设备不同,不同厂家的PA6切片的晶体结构存在差异;PA6切片以及对应的无油丝中含有α与γ晶型晶体,并且无油丝的衍射峰比PA6切片的衍射峰宽,两者的α晶型的衍射峰之间的间距较小;PA6切片在纺丝高温作用下,存在γ晶型向α晶型转变,α晶型的晶粒小,且结晶不完善,PA6无油丝更易结晶。The crystal structure transformation of polycaprolactam （PA6） chips from different producers was analyzed during spinning process by differential scanning calorimetry （DSC） and X-ray diffraction analysis. The results showed that the PA6 chips from different producers had different crystal structure due to different technological process and polymerization units; the and γ crystals existed both in PA6 chips and oil-free PA6 fibers, and the oil-free PA6 fibers had wider diffraction peaks than PA6 chips but their α crystal peak space was relatively small; PA6 chips had γ crystals transforming into α crystals with small grain and imperfect structure during high-temperature spinning process, and the oil-free PA6 fibers were easier to crystallization.

关 键 词：聚己内酰胺纤维 无油丝 结晶性能 晶体结构 

分 类 号：TQ342.11[化学工程—化纤工业]