Mixtures of numerous different n-alkanes:: 2.: Studies by X-ray diffraction and differential thermal analyses with increasing temperature

被引：53

作者：

Chevallier, V ^{[1
]}

Petitjean, D ^{[1
]}

Bouroukba, M ^{[1
]}

Dirand, M ^{[1
]}

机构：

[1] Ecole Natl Super Ind Chim, Inst Natl Polytech Lorraine, Lab Thermodynam Separat, F-54001 Nancy, France

来源：

POLYMER | 1999年 / 40卷 / 08期

关键词：

n-alkanes; multi-n-alkane solid solution; rotator phases;

D O I：

10.1016/S0032-3861(98)00409-1

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The structural behaviour of the orthorhombic multi-il-alkane crystalline beta' phase, observed in mixtures consisting of 23 (19 < n < 43) and 33 (19 < n < 53) n-alkanes respectively, is studied by X-ray diffraction with increasing temperature. A Rotator single-phase domain of rhombohedral (or hexagonal) alpha-RII type is observed below the solidus point. The product, consisting of 23 n-alkanes, undergoes this structural transition (beta' --> alpha-RII) through two two-phase domains: first, a region with the beta' and beta(Fmmm) phases; then, a domain with the two beta(Fmmm)-RI and alpha((R (3) over bar m)-RII Rotator phases. For two beta' solid solutions consisting of 33 n-alkanes, a single two-phase domain (beta' + alpha-RII) is observed in the course of this structural crystal-Rotator transition. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2129 / 2137

页数：9

共 35 条

[1] BINARY-SYSTEMS OF EVEN-NUMBERED N-ALKANES (C2P H4P+2-C2P+2 H4P+6, 10-LESS-THAN-OR-EQUAL-TO-P-LESS-THAN-OR-EQUAL-TO-12) [J].