CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*

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CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*

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- CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*
- CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*
- 高分子科学（英文版） 2003年21卷第2期页码：189-204
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- 纸质出版：2003-04-20
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CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*[J]. 高分子科学（英文版）, 2003,21(2):189-204.

CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*[J]. 2003, 21(2): 189-204.
CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*[J]. 高分子科学（英文版）, 2003,21(2):189-204. DOI：

CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*[J]. 2003, 21(2): 189-204. DOI：

摘要

The morphology and crytal structure of poly(p-phenylene terephthalate) (PPT)

prepared by confined thin filmmelt (CTFMP) and solution (CTFSP) and bulk solution polymerization

were characterized by transmission electronmicroscopy

electron dimaction and molecular modeling. The unit cell is monoclinic (P21/a space group) with parameters a =7.89

b = 5.49

c = 12.65 A

α=γ= 90°

β=100.33°

density = 1.48 g/cm3

the a

b and β values differing slightly from thosereported previously in the literature. A degree of variation in relative intensities of hk0 reflections in

apparently

untilted [001] ED patterns was observed from a given sample

suggesting some variation in molecular packing.ED evidence was found for a second phase

with [001] appearing the same as for phase II of the related poly(p-oxybenzoate) (PpOBA) polymer.CTFMP crystals polymerized obove 220℃ (up to 370℃) and CTFSP crystals polymerized at 300℃ consisted of lamellae 100-200 A thick.

Abstract

The morphology and crytal structure of poly(p-phenylene terephthalate) (PPT)

prepared by confined thin filmmelt (CTFMP) and solution (CTFSP) and bulk solution polymerization

were characterized by transmission electronmicroscopy

electron dimaction and molecular modeling. The unit cell is monoclinic (P21/a space group) with parameters a =7.89

b = 5.49

c = 12.65 A

α=γ= 90°

β=100.33°

density = 1.48 g/cm3

the a

b and β values differing slightly from thosereported previously in the literature. A degree of variation in relative intensities of hk0 reflections in

apparently

untilted [001] ED patterns was observed from a given sample

suggesting some variation in molecular packing.ED evidence was found for a second phase

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