Dilution wave and negative-order crystallization kinetics of chain molecules

Ungar G.; Higgs PG.; de Silva DSM.Boda E.Chen CM.Mandal PK.

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Dilution wave and negative-order crystallization kinetics of chain molecules

机译：Dilution wave and negative-order crystallization kinetics of chain molecules

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We show that the crystal growth rate of a very long-chain n-alkane C198H398 from solution can decrease with increasing supersaturation and follow strongly negative order kinetics. The experimental behavior can be well represented by a theoretical model which allows the molecule to attach and detach as either extended or folded in two. The obstruction of extended-chain growth by unstable folded depositions increases disproportionately with increasing concentration. As a consequence of this abnormal kinetics, a "dilution wave" can propagate and trigger a folded-to-extended-chain transformation on its way. References: 32

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《Physical review letters》 |2000年第20期|4397-4400|共4页
作者
Ungar G.; Higgs PG.; de Silva DSM.Boda E.Chen CM.Mandal PK.;
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作者单位

Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England.;

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原文格式 PDF
正文语种英语
中图分类物理学;
关键词
Polyethylene single-crystals; Polymer crystals; Growth-kinetics; Normal-paraffins; Rates; Temperature; Lengths; Alkanes; Onset;

Dilution wave and negative-order crystallization kinetics of chain molecules

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