MULTIPLE MELTING AND CRYSTALLIZATION BEHAVIOR OF NYLON 1212附视频

被引：0

作者：

莫志深

机构：

[1] StateKeyLaboratoryofPolymerPhysicsandChemistryChangchunInstituteofAppliedChemistry,GraduateSchoolofChineseAcademyofSciences

来源：

Chinese Journal of Polymer Science | 2006年 / 02期

关键词：

Multiple melting; Nylon; 1212; Crystallization;

D O I：

暂无

中图分类号：

O633.2 [链上含氮的聚合物];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

<正>The wide-angle X-ray diffraction (WAXD) patterns of isothermally crystallized Nylon 1212 show thatγ-form crystals form below 90℃and the a-form crystals can exist above 140℃. In the temperature range of 90-140℃, theα-form andγ-form crystals coexist. Variable-temperature WAXD exhibits that the nylon 1212γ-form does not show crystal transition on heating, whileα-form isothermally crystallized at 160℃exhibits Brill transition at a little higher than 180℃on heating. The multiple melting behaviors of Nylon 1212 isothermally crystallized from melt come from a complex mechanism of different crystal structures, dual lamellar population and melting-recrystallization. In polarized optical microscope (POM) observations, Nylon 1212 isothermally crystallized at 175℃shows the ringed banded spherulites. However, at temperatures below 160℃the ringed banded image disappears, and cross-extinct spherulites are formed.

引用

页码：187 / 193

页数：7

共 2 条

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