INFLUENCE OF IMPERFECTIONS ON THE DISORDERING OF BLOCK-COPOLYMER CYLINDERS

Authors
BALSARA NP DAI HJ KESANI PK GARETZ BA HAMMOUDA B
Citation
Np. Balsara et al., INFLUENCE OF IMPERFECTIONS ON THE DISORDERING OF BLOCK-COPOLYMER CYLINDERS, Macromolecules, 27(25), 1994, pp. 7406-7409
Citations number
15
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecules → ACNP
ISSN journal
00249297
Volume
27
Issue
25
Year of publication
1994
Pages
7406 - 7409
Database
ISI
SICI code
0024-9297(1994)27:25<7406:IOIOTD>2.0.ZU;2-Z
Abstract
Small-angle neutron scattering and optical birefringence were used to study the disordering transition of a cylindrically ordered block copo lymer material. It was found that the disordering temperature of shear -oriented ''single crystals'' was 62 degrees C, while that of imperfec t, granular samples formed under quiescent conditions was 49 degrees C . In sheared samples where the imperfections were partially removed, c oexistence of ordered and disordered regions was observed at temperatu res between 49 and 62 degrees C.