A new look at the run number concept in copolymer characterization
A new look at the run number concept in copolymer characterization
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DOI：
10.1021/ma00190a017
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发表时间：
1988-12
期刊：
影响因子：
5.5
通讯作者：
J. C. Randall;C. Ruff
中科院分区：
文献类型：
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作者：
J. C. Randall;C. Ruff
“运行数”，介绍了由HarwoodandRitchey在1964年，在这项研究中审查的仪器，现在允许运行数测量的发展。该概念扩展到包括测量半结晶聚合物中的“链标点”，即每100个重复单元中具有结晶能力的序列数。不能结晶的间隔序列被认为是链式标点单位。“序列号”也作为“运行号”的附属物引入。它只是每100个特定类型的重复单元的序列总数，并且包括共聚物链中1至最长序列长度的序列长度。
The “run number”, introduced by Harwoodand Ritchey in 1964, is reviewed in this study in light of developments in instrumentation, which now permit run number measurements. The concept is extended to include measurements of “chain punctuation” in semicrystalline polymers, that is, the number of sequences per 100 repeat units that have the capability for crystallization. Intervening sequences, incapable of crys-tallization, are regarded as chain punctuating units. The “sequence number” is also introduced as an adjunct to the “run number”. It is simply the total number of sequences per 100 repeat unitsof a particular type and includes sequence lengths of one to whatever is the longest sequence length in the copolymer chain.