The phase behavior of gamma and laser irradiated polytetrafluorine

被引：8

作者：

Allayarov, S. R. ^{[1
]}

Olkhov, Yu. A. ^{[1
]}

Nikolskii, V. G. ^{[2
]}

Grakovich, P. N. ^{[3
]}

Dixon, D. A. ^{[4
]}

机构：

[1] Russian Acad Sci, Inst Problems Chem Phys, Moscow 117901, Russia

[2] Russian Acad Sci, Inst Chem Phys, Moscow 117901, Russia

[3] Natl Acad Sci Belarus, Inst Mech Met Polymer Syst, Minsk, BELARUS

[4] Univ Alabama, Dept Chem, Tuscaloosa, AL 35487 USA

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2014年 / 8卷 / 04期

关键词：

polytetrafluoroethylene; powder; sheet; gamma-irradiation; thermomechanical analysis; anisotropic topological structure; MOLECULAR-TOPOLOGICAL STRUCTURE;

D O I：

10.1134/S1990793114040186

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

By using thermomechanical spectroscopy, an amorphous and three crystalline (high melting, intermediate, and low melting forms) blocks of the topological structures of polytetrafluoroetylene (PTFE) were characterized and their behavior under gamma-radiation up to 2420 kGy was explored. The influence of gamma-radiation on the powder and sheet of PTFE is essentially the same leading to formation of amorphous character. The glass transition and melting point temperatures of PTFE continuously decreased with increasing dose of irradiation. On exposure to continuous CO2 laser radiation, PTFE degrades at a high rate and its clusters have a fibrous form. Initial gamma-irradiation of PTFE enhances the laser ablation process.

引用

页码：574 / 576

页数：3

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