真空中聚合物的碰撞
Collision of Polymers in a Vacuum
摘要：
在许多实验情况下，单个聚合物分子可以悬浮在真空中。这里考虑的是这些分子之间的碰撞。高碰撞速度的限制进行了研究，在各种条件下的数值。分析了接触时间、散射角和最终速度的分布。在这个限制，自我避免链被发现成为高度拉伸，因为它们相互碰撞，并有一个分布的散射时间，这取决于散射角。碰撞后分子的速度与假设碰撞过程中分子热平衡的模型预测相似。最重要的区别是非弹性散射但基本上不改变方向的分子的重要子集。
英文摘要：
In a number of experimental situations, single polymer molecules can be suspended in a vacuum. Here collisions between such molecules are considered. The limit of high collision velocity is investigated numerically for a variety of conditions. The distribution of contact times, scattering angles, and final velocities are analyzed. In this limit, self avoiding chains are found to become highly stretched as they collide with each other, and have a distribution of scattering times that depends on the scattering angle. The velocity of the molecules after the collisions is similar to predictions of a model assuming thermal equilibration of molecules during the collision. The most important difference is a significant subset of molecules that inelastically scatter but do not substantially change direction.
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