新型PP/IPN相变纤维的纺制

以聚乙二醇丙烯酸酯为相容剂,将聚N-羟甲基丙烯酰胺/聚乙二醇互穿网络聚合物(简称IPN)与聚丙烯(PP)共混并纺丝,制备新型PP/IPN相变纤维。测试了共混物的流变性能,共混纤维的力学性能、热性能及回潮率。结果表明:共混物为切力变稀流体,共混纤维断裂强度随IPN含量的增加先增大后下降,相变焓随IPN含量的增大而提高,共混纤维的吸湿能力较纯PP高。当w(IPN)为20%时,断裂强度保持在3 cN/dtex以上,熔融相变焓达17.10 J/g,回潮率达0.68%。

Spinning of novel PP/IPN phase change fibers

Phase change material was prepared by blending poly(N-hydroxymethyl acrylamide)/polyethylene glycol interpenetrating networks polymer(IPN) and polypropylene(PP) with polyethylene glycol acrylates as compatibilizer.The resultant PP/IPN blend was taken as raw material to spin a kind of novel phase change fiber.The rheological property of the blend,the mechanical and thermal properties and moisture regain of the fiber were studied.The results show that the PP/IPN blend can be classified as shear thinning fluid in terms of its behavior.As the IPN content rises the fiber’s breaking strength experiences a variation of going up at first and then going down while the phase change enthalpy just exhibits a monotonous increase.The fiber has a higher moisture regain than its counterpart made of pure PP.When the mass fraction of IPN is 20% the breaking strength of the fiber remains above 3 cN/dtex,the melting phase change enthalpy reaches 17.10 J/g and moisture regain attains 0.68%.