A study of polymer degradation using Doppler Broadening Positron Annihilation Spectroscopy

被引：1
|
作者：
Beyeler, NT [1 ]
Weiss, KA [1 ]
Schaffer, JP [1 ]
机构：
[1] Lafayette Coll, Easton, PA 18042 USA
来源：
POSITRON ANNIHILATION: ICPA-11 - PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON POSITRON ANNIHILATION, KANSAS CITY, MISSOURI, USA, MAY 1997 | 1997年 / 255-2卷
关键词：
polycarbonate; polymethyl methacrylate (PMMA); positron annihilation; ultraviolet degradation;
D O I：
10.4028/www.scientific.net/MSF.255-257.278
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Doppler Broadening Positron Annihilation Spectroscopy (DBPAS) has been used to investigate the bulk defect concentration of polymer samples which have been subjected to radiation. The experimental variables under investigation were the duration and type of exposure. ?he key results are summarized as follows. (i) the resolution of the experimental apparatus was adequate in statistically distinguishing between distinct defect concentrations at successive exposure intervals; (ii) for PMMA, increased radiation causes the S parameter to increase, however in polycarbonate samples, a decrease in S parameter was found.
引用
收藏
页码：278 / 280
页数：3
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