Free-volume evolution in the system polycarbonate-polycaprolaptone studied by positron annihilation spectroscopy

被引：3
|
作者：
del Río, J [1 ]
Serna, J
Plazaola, F
Iruin, JJ
Nazabal, JL
机构：
[1] UCM, Fac Fis, Dept Fis Mat, Madrid 28040, Spain
[2] EHU, Bilbao 48080, Spain
[3] Univ Basque Country, Dept Ciencia & Tecnol Polimeros, San Sebastian 20018, Spain
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2001年 / 287卷 / 1-3期
关键词：
D O I：
10.1016/S0022-3093(01)00560-9
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Positron annihilation spectroscopy (PAS) can measure the free-volume properties in polymeric materials. In this paper PAS has been used to follow the free-volume evolution in several samples of polycarbonate (PC) with different contents of polycaprolaptone (PCL) and different annealing times at 418 K. Results show that an increase in the content of the PCL added to the sample decreases the free-volume radius present in the PC. From the data obtained it can be observed that the free-volume radius is linearly dependent on the content of PCL in the range 0-10%. of PCL. An increase in the annealing time at 418 K also produces a decrease in the free-volume radius of the samples. However, the relative variation in the free volume of the samples is much less than the change produced by the PCL. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：100 / 103
页数：4
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