The effect of copolymerization with propylene on the fracture behaviour of solution-spun ultra-drawn, ultra-high molecular weight polyethylene (UHMW-PE, M w > 103 kgmo1-1) fibres was investigated. UHMW-PE grades with virtually identical molecular weight and varying comonomer content (0.5-13.5 CH3/1000 C atoms) were used. It is shown that the tensile strength of drawn UHMW-PE fibres, at a constant Young's modulus, is independent of the comonomer content of the polymer. Apparently, the methyl side-groups hardly influence the fracture behaviour of the fibres. In combination with the experimental observation that methyl side-groups decrease intermolecular chain slippage (creep), this indicates that the failure process of solution-spun, drawn UHMW-PE fibres is mainly controlled by chain scission
Посилання на статтю:
Tensile strength of solution-spun, ultra-drawn ultra-high molecular weight polyethylene fibres: 2. Influence of propylene comonomer content / C. W. M. Bastiaansen* and G. P. Grooters // Polymer. – 1992. – Vol 33. – P. 1653-1655.