光/生物双降解聚乙烯纤维的结构与性能

Structure and properties of photo-biodegradable polyethylene fiber

为得到具有光和生物双降解性及一定力学强度的纤维,通过熔融纺丝法纺制了光/生物双降解聚乙烯纤维。利用单纤维强力仪测定了纤维的力学性能,结果表明,光/生物双降解聚乙烯纤维的断裂强度与常规聚乙烯纤维相近,具备一定的力学性能。通过实验室紫外光老化降解和土埋生物降解实验,研究了纤维的光降解性和生物降解性,结果表明:随着紫外光照射时间的延长,光/生物双降解纤维的降解率增大,明显高于低密度聚乙烯纤维;随生物降解时间的延长,纤维的降解率逐渐增大,最大降解率为27.65%。

In order to get a fiber which has photo-biodegradability and certain mechanical strength simultaneously,the photo-biodegradable polyethylene fiber was prepared by melt spinning.The mechanical properties were characterized with fiber tensile tester,and it was found that the breaking strength of the photo-biodegradable polyethylene fiber is close to that of the regular polyethylene fiber,which can be used as the general fiber material.The photodegradability and biodegradability of the fiber were studied by UV aging degradation and soil burial biodegradation,respectively.The results indicated that the decomposition rate of photo-biodegradable polyethylene fiber increases as the ultraviolet light period prolongs,much higher than that of the low density polyethylene fiber.With prolonging of the biological degradation time,the degradation rates increases gradually until up to 27.65%.