PDMS behaviour under confinement in strongly segregated mesophases of PS-PDMS diblock copolymers

被引：12
作者：
del Valle-Carrandi, L. [1 ,2 ]
Alegria, A. [1 ,2 ]
Colmenero, J. [1 ,2 ,3 ]
机构：
[1] Univ Pais Vasco UPV EHU, Ctr Fis Mat, Ctr Mixto CSIC UPV EHU, San Sebastian 20080, Spain
[2] Univ Pais Vasco UPV EHU, Dept Fis Mat, San Sebastian 20080, Spain
[3] Donostia Int Phys Ctr, San Sebastian 20018, Spain
来源：
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2010年 / 189卷 / 01期
关键词：
BLOCK-COPOLYMERS; DYNAMICS; POLY(DIMETHYLSILOXANE);
D O I：
10.1140/epjst/e2010-01330-0
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A dynamic and thermal investigation by means of broadband dielectric spectroscopy and temperature modulated differential scanning calorimetry on the PDMS behaviour in several highly segregated diblock copolymers with varying PDMS molecular weight and volume fraction is presented. The mesophase morphology of these diblock copolymers has been characterized by means of transmission electron microscopy and small angle X-ray scattering. It is found that whereas the lamellar morphology (1D confinement) does not affect significantly the PDMS properties, in the case of the cylindrical (2D confinement) and spherical (3D confinement) segregations of the PDMS component in the PS matrix noticeable effects are evident, such as a strong reduction of the PDMS glass-transition temperature and a strong decrease (even suppression) of PDMS crystallinity ratio.
引用
收藏
页码：257 / 261
页数：5
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