Single-chain structure in model polyethylene melts
Single-chain structure in model polyethylene melts
复制标题
模型聚乙烯熔体中的单链结构
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
J. Honeycutt
中科院分区：
文献类型：
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作者：
J. McCoy;K. G. Honnell;J. Curro;K. Schweizer;J. Honeycutt
RIS模型通常被认为是描述聚合物链在熔体和θ溶剂中的单链结构的极好模型。这种单链结构的表现形式是相关函数ω（r），它是同一条链上两个位点相隔距离r的概率。从RIS模型评估ω（r）需要费力的统计平均值，因此，ω（r）的各种估计是重要的。理解聚合物的行为需要n个近似的ω（r），这在所有长度尺度上都是准确的。这样的近似，并比较计算机模拟和以前的，更粗粒度的方法
The RIS model is usually considered to be an excellent description of the single-chain structure of polymer chains both in the melt and in θ solvents. The manifestation of this single-chain structure is the correlation function ω(r), which is the probability that two sites on the same chain are separated by a distance r. The evaluation of ω(r) from the RIS model requires laborious statistical averages, and, as a consequence, various approrimations of ω(r) are of importance. Understanding the polymer behavior requires n approximate ω(r) which is accurate on all length scales. Such an approximation is presented and compared to both computer simulation and previous, more coarse-grained approaches