The orientations of polyurethanes resulted in a large number of the residual orientation , the stress softing and stress hysteresis , the permanent set , the higher modulus and strength of materials .
取向的结果，导致大量的硬段残留取向、应力软化、应力滞后和高变形，以及材料的高模量和高强度。
The results showed that the high carboxylated NBR featured high hardness, tensile strength and modulus, good abrasion resistance, but greater permanent set and poorer processing safety;
结果表明，高羧基丁腈橡胶具有硬度、拉伸强度和定伸应力高，耐磨性好，压缩永久变形大，加工安全性较差等特点；
The results showed that the high carboxylated NBR featured high hardness, tensile strength and modulus, good abrasion resistance, but greater permanent set and poorer processing safety;
结果表明，高羧基丁腈橡胶具有硬度、拉伸强度和定伸应力高，耐磨性好，压缩永久变形大，加工安全性较差等特点；
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