3 years ago

Crystallization and stress relaxation behaviors of UHMWPE/CNT fibers

Zhaoxia Zhang, Chengyue Guo, Ronggen Ling, Fu Sun, Guoqing Zhang, Juming Yao

Abstract

Crystallization and stress relaxation behaviors of ultrahigh molecular weight polyethylene (UHMWPE) doped with carbon nanotubes (CNTs) have been investigated by X‐ray diffraction, differential scanning calorimetry (DSC) and single strand strength testing. Compared with UHMWPE, crystallinity of the UHMWPE/CNT composites significantly increases from 71.95 to 82.92% while crystallization activation energy decreases from 679.4 to 535.8 KJ/mol. CNTs as the nucleating agent changes the nucleation type of UHMWPE from homogenous to heterogeneous and accelerates the nucleation and growing of crystalline grains. Above crystallization changes also affect the mechanical properties of the UHMWPE/CNTs composites. Stress relaxation testing indicates that the relaxation stability of UHMWPE/CNT composites increases while the relaxation rate decreases. J. VINYL ADDIT. TECHNOL., 2016. © 2016 Society of Plastics Engineers

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