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

Your Location：

Home >

Browse articles >

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

Papers | Updated：2021-06-21

- CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*
- Vol. 21, Issue 2, Pages: 189-204(2003)
- Affiliations：
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：20 April 2003
- Accepted：
Scan QR Code
CRYSTAL STRUCTURE AND MORPHOLOGY OF NASCENT SAMPLES OF SYMMETRIC AROMATIC POLYESTERS——Ⅰ.POLY(P-PHENYLENE TEREPHTHALATE)*[J]. 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

关键词

Keywords

references

Views

Downloads

CSCD

Alert me when the article has been cited

Submit

Tools

Publicity Resources

Molecularly Engineered Polyimide Films with Switchable Cavitation for Bidirectional Passive Thermal Regulation

On-demand Peelable UV-curable Adhesives with Superior Bonding Strength: Rational Molecular Engineering of Cohesion-adhesion Synergy

Two-way Shape Memory Effect of Polycaprolactone-based Polyurethane via Synergistic Role of Hydrogen Bonding and Crystallization Tuned by Malic Acid

Sequence-encoded Conformation Pathways in Viscoelastic Microphase Separation of Multiblock Copolymers

A Paradigm for BF3 Co-initiated Cationic Polymerization with Low Dispersity: Introducing Acetonitrile and Lowering the Reaction Temperature

Related Author

No data

Related Institution

No data

⁰