THE PHASE EQUILIBRIA BETWEEN A CRYSTALLINE POLYMER AND SOLVENTS .1. THE EFFECT OF POLYMER CHAIN LENGTH ON THE SOLUBILITY AND SWELLING OF POLYTHENE .2. THE EFFECT OF SOLVENT TYPE ON THE SOLUBILITY AND SWELLING OF POLYTHENE
THE PHASE EQUILIBRIA BETWEEN A CRYSTALLINE POLYMER AND SOLVENTS .1. THE EFFECT OF POLYMER CHAIN LENGTH ON THE SOLUBILITY AND SWELLING OF POLYTHENE .2. THE EFFECT OF SOLVENT TYPE ON THE SOLUBILITY AND SWELLING OF POLYTHENE
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DOI：
10.1039/tf9464200010
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发表时间：
1946-01-01
影响因子：
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通讯作者：
RICHARDS, RB
中科院分区：
文献类型：
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作者：
RICHARDS, RB
简单液体之间以及液体与结晶固体之间的相平衡已被广泛研究。近年来，人们开始关注长链分子的溶解度关系，并在短链和长链分子混合熵的统计热力学计算方面取得了很大进展。无定形聚合物如聚苯乙烯和橡胶受到最多的关注，它们在溶剂中的溶解度是根据双液体体系来处理的，但是Huggins已经表明中等链长的结晶石蜡，如C81H122，是个骗局结晶聚合物的结构介于无定形聚合物的结构之间，完全是由链烷烃分子的柔性引起的。晶体长链材料，并且溶解度行为相应地更复杂。本文讨论了结晶烃类聚合物聚乙烯与各种典型短链材料的相关系，考察了平均分子量和分子量分布对溶解度的影响。在随后的论文中，将显示溶剂类型变化的影响。
The phase equilibria between simple liquids and between liquids and crystalline solids have been extensively studied. More recently attention has been given to the solubility relations of long chain molecules, and much progress has been made in statistical thermodynamic calculations of the entropy of mixing of short and long chain molecules. 19 Amorphous polymers such as poly~ tyrene,~~ and rubber 5 have received most attention, their solubility in solvents being treated in terms of a two liquid system, but Huggins has shown how the unexpectedly high solubility of crystalline paraffins of moderate chain length, eg, Cg,, H122, is a con-sequence of a high entropy of solution which in turn is due to the flexibility of the paraffin molecule.Crystalline polymers have structures intermediate between those of amorphous polymers and entirely crystalline long chain materials, and the solubility behaviour is correspondingly more complex. In this paper the phase relations between polythene, a crystalline hydrocarbon polymer, and various typical short chain materials will be discussed, and the effect of average molecular weight and molecular weight distribution on the solubility will be examined. In the succeeding paper the effect of variation in the solvent type will be shown.