CRYSTAL-STRUCTURE, CRYSTALLIZATION KINETICS AND MORPHOLOGY OF A NEW POLYIMIDE

被引：29

作者：

CHENG, SZD ^{[1
]}

MITTLEMAN, ML ^{[1
]}

JANIMAK, JJ ^{[1
]}

SHEN, DX ^{[1
]}

CHALMERS, TM ^{[1
]}

LIEN, HS ^{[1
]}

TSO, CC ^{[1
]}

GABORI, PA ^{[1
]}

HARRIS, FW ^{[1
]}

机构：

[1] UNIV AKRON,COLL POLYMER SCI & POLYMER ENGN,DEPT POLYMER SCI,AKRON,OH 44325

来源：

POLYMER INTERNATIONAL | 1992年 / 29卷 / 03期

关键词：

CRYSTAL UNIT CELL; GLASS TRANSITION; LAMELLAE; MELTING MORPHOLOGY; OVERALL CRYSTALLIZATION; SEMICRYSTALLINE POLYIMIDE;

D O I：

10.1002/pi.4990290309

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A new semicrystalline polyimide has been synthesized from 3,3,4,4'-benzophenonetetracarboxylic dianhydride and 2,2-dimethyl-1,3-(4-aminophenoxy)propane. The polymer has a high glass transition temperature of 230-degrees-C and a melting temperature of 325-degrees-C. Its overall crystallization rate between 240 and 325-degrees-C is quite fast (t1/2 < 10 min) and relatively insensitive to the crystallization temperature. Although the degree of crystallinity obtained is dependent on the crystallization conditions, it can be as high as 50%. The polymer's morphology, which was examined with transmission electron microscopy (TEM), has a randomly stacked, ribbon-like, lamellar texture. Both TEM and polarized light microscopy show that mature spherulites do not develop. The crystal unit cell, which was determined from wide-angle X-ray diffraction measurements on highly oriented films, is monoclinic with a = 0.960 nm, b = 0.582 nm, c = 2.46 nm and gamma = 81.1-degrees.

引用

页码：201 / 208

页数：8

共 29 条

[1] Granulation, Phase Change, and Microstructure - Kinetics of Phase Change. III [J].