CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅱ. POLY(p-PHENYLENE 2,6-NAPHTHALATE)*

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CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅱ. POLY(p-PHENYLENE 2,6-NAPHTHALATE)*

Papers | Updated：2021-06-21

- CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅱ. POLY(p-PHENYLENE 2,6-NAPHTHALATE)*
- Vol. 21, Issue 2, Pages: 205-221(2003)
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- Published：20 April 2003
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CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅱ. POLY(p-PHENYLENE 2,6-NAPHTHALATE)*[J]. 2003, 21(2): 205-221.
DOI：

CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅱ. POLY(p-PHENYLENE 2,6-NAPHTHALATE)*[J]. 2003, 21(2): 205-221. DOI：

摘要

Confined thin film melt polymerization (CTFMP) of naphthalene chloride/hydroquinone (NCMQ

1/1

molar)mixtures at polymerization temperatures (Tp) below ca. 300℃ resulted in relatively thick

elongated crystals. Polymerizationof NC/HQ above 300℃ between glass yielded well-formed lamellar crystals ca. 100 A thick. Phase Ⅰ and Ⅱ [001] EDpatterns were obtained for all Tp

the relative amount of phase Ⅰ increasing with Tp. Polymerization of naphthalenedicarboxylic acid/hydroquinione diacetate 1/1 mixtures at high Tp also yielded lamellar crystals that "curled up" off of the substrate.When the high temperature CTFMP polymerization was conducted between mica

aggregates of lamellae on-edge developed but epitaxial growth did not occur.Epitaxial growth of lamellae between mica could be obtained

however

by confined thin film solution polymerization

with both of the latter samples yielding apparently related ED patterns from a different unit cell than phase I or II.Fiber patterns

obtained from sheared samples

indicated considerably greater crystal disorder than in the nascent crystals.Refinement of the phase I unit cell parameters

based on the [001] and [011] ED patterns

with modeling based on Cerius2

suggests a monoclinic phase I unit cell with α=7.76

b=5.71

c=14.99A

α=γ=90°

β=99.7°

ρ=1.47 g/cm3

space group P121/a1.

Abstract

Confined thin film melt polymerization (CTFMP) of naphthalene chloride/hydroquinone (NCMQ

1/1

molar)mixtures at polymerization temperatures (Tp) below ca. 300℃ resulted in relatively thick

elongated crystals. Polymerizationof NC/HQ above 300℃ between glass yielded well-formed lamellar crystals ca. 100 A thick. Phase Ⅰ and Ⅱ [001] EDpatterns were obtained for all Tp

aggregates of lamellae on-edge developed but epitaxial growth did not occur.Epitaxial growth of lamellae between mica could be obtained

however

by confined thin film solution polymerization

with both of the latter samples yielding apparently related ED patterns from a different unit cell than phase I or II.Fiber patterns

obtained from sheared samples

indicated considerably greater crystal disorder than in the nascent crystals.Refinement of the phase I unit cell parameters

based on the [001] and [011] ED patterns

with modeling based on Cerius2

suggests a monoclinic phase I unit cell with α=7.76

b=5.71

c=14.99A

α=γ=90°

β=99.7°

ρ=1.47 g/cm3

space group P121/a1.

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