Binary phase diagram of molecular alloys of the consecutive even-numbered n-alkanes n-tetracosane (n-C24H50) and n-hexacosane (n-C26H54)

被引：18

作者：

AchourBoudjema, Z ^{[1
]}

Bouroukba, M ^{[1
]}

Dirand, M ^{[1
]}

机构：

[1] ECOLE NATL SUPER IND CHIM,INST NATL POLYTECH LORRAINE,LAB THERMODYNAM CHIM & APPL,F-54001 NANCY,FRANCE

来源：

THERMOCHIMICA ACTA | 1996年 / 276卷

关键词：

binary phase diagram; differential enthalpimetry; DTA; DSC; molecular alloy n-hexacosane; molecular alloy n-tetracosane; X-ray diffraction;

D O I：

10.1016/0040-6031(95)02734-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The phase diagram of molecular alloys of n-tetracosane (n-C24H50) and n-hexacosane (n-C26H54) has been established by a joint thermodynamic and structural study of twenty five compositions. At ''low temperatures'' it shows the existence of two limited domains of terminal solid solutions gamma(0)(C-24) and gamma(0)(C-26) and of three orthorhombic intermediate phases, denoted beta'(1), beta '' and beta'(2). With increasing temperatures, these five solid solutions undergo the same solid-solid transitions as those observed in the even-numbered and odd-numbered pure n-alkanes and in the system n-docosane (n-C22H46)-n-tetracosane (n-C24H50), i.e.: gamma(0)(C24) and gamma(0)(C-26) --> Rotator phase alpha-RII (R(3) over barm$) --> Liquid beta'(1), beta'(2) and beta '' --> Rotator phase beta-RI (Fmmm) --> alpha-RII --> Liquid

引用

页码：243 / 256

页数：14

共 27 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].