固相增黏环境氧含量对超高黏尼龙6 薄膜晶点的影响  

Effect of oxygen content in solid-phase viscosity increasing environment on crystal points of ultra-high viscosity nylon 6 films

作　　者：黎安娴 LI Anxian(Caprolactam Division of SINOPEC Hunan Petrochemical Co.,Ltd.,Yueyang 414007)

机构地区：[1]中石化湖南石油化工有限公司己内酰胺部,湖南岳阳414007

出　　处：《合成纤维工业》2024年第1期39-42,共4页China Synthetic Fiber Industry

基　　金：中石化股份有限公司研究项目(202141)。

摘　　要：以相对黏度为3.3的尼龙6(PA 6)切片为原料,在不同氧含量环境下,通过固相增黏制备超高黏尼龙6(PA 6)切片,并利用小型实验室吹膜机制得相应超高黏PA 6薄膜,研究了环境氧含量对超高黏PA 6切片熔融结晶行为、紫外性能,以及相应超高黏PA 6薄膜晶点数和晶点形貌的影响。结果表明:超高黏PA 6切片的结晶起始温度、结晶峰温度、结晶焓随环境氧含量的提高先增大后下降;超高黏PA 6薄膜的晶点数随着环境氧含量的提高而增多,当环境氧含量大于10 mg/kg时,超高黏PA 6薄膜的晶点数超过3个/cm 2,无法满足使用要求;室温下超高黏PA 6切片薄膜的晶点呈带状,当温度升至300℃,晶点周围PA 6完全融化,但晶点仍保持形态不变;PA 6切片在热氧的作用下发生交联反应形成凝胶物质是导致晶点形成的主要原因。Using nylon 6(PA 6)chip with a relative viscosity of 3.3 as raw materials,ultra-high viscosity PA 6 chips were prepared by solid-phase viscosity increasing under different oxygen content environments.The corresponding ultra-high viscosity PA 6 films were obtained using a small-scale laboratory film blowing machine.The effect of environmental oxygen content on the melting crystallization behavior and ultraviolet performance of ultra-high viscosity PA 6 chips and the number and morphology of crystal points of the corresponding ultra-high viscosity PA 6 films were studied.The results showed that the initial crystallization temperature,crystallization peak temperature and crystallization enthalpy of ultra-high viscosity PA 6 chips increased first and then decreased with the increase of environmental oxygen content;the number of crystal points in the ultra-high viscosity PA 6 film increased with the increase of environmental oxygen content,and the number of crystal points in the ultra-high viscosity PA 6 film exceeded 3/cm 2 when the environmental oxygen content was higher than 10 mg/kg,which could not meet the usage requirements;the crystal points of the ultra-high viscosity PA 6 film zonally distributed at room temperature,and the PA 6 around the crystal points completely melted,but the morphology of the crystal points remained unchanged when the temperature rose to 300℃;and the main reason for the formation of crystal points was the cross-linking reaction of PA 6 chips to form gel material under the action of hot oxygen.

关 键 词：尼龙6 固相增黏 薄膜 氧含量 交联 晶点 

分 类 号：TQ340.69[化学工程—化纤工业]