分子筛改性PET纤维的制备和性能研究

将分子筛、添加剂(分散剂、交联剂)以不同的比例和PET切片共混进行母粒法熔融纺丝,制得分子筛改性PET纤维,并测定纤维的力学性能、吸湿性能和染色性能。结果表明：当纤维中分子筛质量分数为2%时,改性PET纤维的可纺性较好；添加剂含量存在最佳值,与纯PET纤维相比,分子筛：分散剂(质量比)为1．0：1．8时,改性纤维断裂强度提高39．7%,含湿率提高30．4%,上染率提高7．7%；分子筛：分散剂：交联剂(质量比)为1．0：1．2：0．2时,改性纤维断裂强度可提高62．7%。分子筛在改性PET纤维中分散均匀,并形成了拟网状结构。

Preparation and properties of molecular sieve modified PET fiber

The molecular sieve modified PET fiber was prepared by blending and melt spinning PET chip with molecular sieve and additives,like dispersant,cross linker,at different ratios.The mechanical properties,hygroscopicity and dyeing behavior of the fiber were measured.The results showed that the modified PET fiber had good spinnability when the molecular sieve content in fiber was 2% by mass fraction;as compared with pure PET fiber,the breaking strength,moisture content and dye up-take of the modified PET fibers were increased by 39.7%,30.4% and 7.7%,respectively,when the mass ratio of molecular sieve and dispersant was 1:1.8;and the breaking strength was increased by 62.7% when the mass ratio of molecular sieve,dispersant and cross linker was 1:1.2:0.2.The molecular sieve had a uniform dispersion in modified PET fiber and formed a net-like construction.