Melting behavior of poly(tetrahydrofuran)S and their blends

被引：8

作者：

Tsuchiya, M ^{[1
]}

Kojima, T ^{[1
]}

机构：

[1] Natl Def Acad, Dept Chem, Kanagawa 2398686, Japan

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2003年 / 72卷 / 02期

关键词：

melting behavior; molecular mass blend; molecular mass dependence; poly(tetrahydrofuran); TM-DSC;

D O I：

10.1023/A:1024598221061

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Melting behavior of poly( tetrahydrofuran)s (PTHF) and their blend with different molecular masses has been studied by TM-DSC. PTHF and their blend show two endothermic peaks on their curve. The melting peak temperatures T-m1 and T-m2, entropy of fusion DeltaS(f1) and DeltaS(f2), and mean relaxation time for melting tau(f1) and tau(f2) have been estimated, and their dependence on the molecular mass has been examined. Plots of T-m1 to the reciprocal of their molecular mass fit a simple equation (T-m= a-b/M-n). Plots of T-m2 to their molecular mass also fit the equation with different factors. There seems to be a boundary around molecular mass 1200 in the molecular mass dependence of DeltaS(f) and tau(f). Effect of blending appeared on the tau(f) and the non-reversing heat flow.

引用

页码：651 / 655

页数：5

共 9 条

[1]

BOVEY FA, 1979, MACROMOLECULES INTRO, P320

[2] EXTRAPOLATION OF ORTHORHOMBIC N-PARAFFIN MELTING PROPERTIES TO VERY LONG CHAIN LENGTHS [J].