【摘 要】
：
Since free ends play an important role in the motion of entangled polymers (reptation, fluctuations),examining the behaviour of ring polymers (which have no beginning or end) is a challenge.In fact,th
【机 构】
：
Foundation for Research and Technology Hellas (FORTH),Institute of Electronic Structure & Laser;Univ
【出 处】
：
Seventh International Symposium On Engineering Plastics (第七届
论文部分内容阅读
Since free ends play an important role in the motion of entangled polymers (reptation, fluctuations),examining the behaviour of ring polymers (which have no beginning or end) is a challenge.In fact,the topic has attracted the attention of scientific community in the 1980s but no definite conclusions could be drawn.The controversial results were attributed to the presence of impurities in the ring samples.To overcome this problem, and in particular the unlinked linear side products from their anionic synthesis, ring polymers were purified via liquid chromatography at the critical condition.
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