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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Reptation and diffusive modes of motion of linear macromolecules
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Reptation and diffusive modes of motion of linear macromolecules

机译:线性大分子的断裂运动和扩散运动模式

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It is shown that the model of underlying stochastic motion of a macromolecule leads to two modes of motion: reptative and isotropically diffusive. There is a length of a macromolecule M* approximate to 10M(e), where M-e is "the macro-molecule length between adjacent entanglements," above which macromolecules of a melt can be regarded as obstacles to motion of each other, and the macromolecules reptate. The transition to the reptation mode of motion is determined by both topological restrictions and local anisotropy of motion. The investigation confirm that the reptation motion determines the M-2 molecular-weight dependence of the self-diffusion coefficient of macromolecules in melts.
机译:结果表明,大分子的基本随机运动模型导致两种运动模式:分别扩散和各向同性扩散。大分子的长度M *约为10M(e),其中Me是“相邻缠结之间的大分子长度”,在该长度之上,熔体的大分子可被视为彼此相互作用的障碍,并且大分子pt。向拓扑运动模式的过渡由拓扑限制和运动的局部各向异性共同决定。研究证实,复制运动决定了M-2分子量对熔体中大分子自扩散系数的依赖性。

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