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Molecular weight distribution formed through chain-length-dependent crosslinking reactions

机译：通过链长相关的交联反应形成的分子量分布

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摘要

The molecular weight distribution formed through chain-length-dependent crosslinking reactions in foe-radical vinyl/divinyl copolymerization is investigated by using Monte Carlo simulations. When the crosslinking reaction rates for larger polymer molecules are reduced, the high molecular weight tails cannot extend smoothly, resulting in distorted, sometimes bimodal distribution profiles, which exhibit qualitative similarity with those reported experimentally. Although the reduced crosslinking reaction rates between larger polymer molecules may not affect the average crosslinking density levels significantly, they can delay the developments of the weight-average molecular weight significantly. Because the wastage of pendant double bends through cyclization would result in a similar tendency, one cannot distinguish these two types of non-idealities through the measurements of the pendant double bond consumption and the average molecular weight development. [References: 39]
机译：通过使用蒙特卡洛模拟研究了在自由基-自由基乙烯基/二乙烯基共聚中通过链长依赖性交联反应形成的分子量分布。当较大的聚合物分子的交联反应速率降低时，高分子量的尾部将无法平滑延伸，从而导致扭曲的双峰分布曲线，有时与实验报道的定性相似。尽管较大的聚合物分子之间降低的交联反应速率可能不会显着影响平均交联密度水平，但它们可以显着延迟重均分子量的发展。由于通过环化作用浪费双侧弯曲分子会导致类似的趋势，因此无法通过测量双侧双键消耗和平均分子量的变化来区分这两种类型的非理想性。 [参考：39]

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