Article (Scientific journals)
Block balance in hydrogenated polybutadiene-b-polymethylmethacrylate diblock copolymer for efficient interfacial activity in low-density polyethylene/polymethylmethacrylate blend: Phase morphology development
Harrats, Charef; Jérôme, Robert
2005In Journal of Polymer Science. Part B, Polymer Physics, 43 (7), p. 837-848
Peer Reviewed verified by ORBi
 

Files


Full Text
Harrats C 2005 JPS Polym Phys 837.pdf
Publisher postprint (780.24 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
nanostructured material; polymer blend
Abstract :
[en] The objective of the present study was to determine the best molecular balance between the two hydrogenated polybutadiene (HPB) and polymethylmethacrylate (PMMA) blocks that promotes an HPB-b-PMMA diblock copolymer with efficient compatibilization activity in a low-density polyethylene (LDPE)/PMMA immiscible blend. The model blend selected, LDPE/PMMA, is "more immiscible" than the LDPE/polystyrene pair largely reported in open literature. The blends having a composition of 80LDPE/20PMMA exhibit a droplet-in-matrix phase morphology whereas in 20LDPE/ 80PMMA a co-continuous phase morphology was developed. In the droplet-in-matrix phase morphology, the emulsifying efficiency of the copolymer was evaluated based on the maximum reduction of the PMMA droplet size it is able to promote. Whereas, in the co-continuous phase morphology, the copolymer was evaluated based on its ability to stabilize the maximum phase co-continuity. The sequences of the best emulsifying copolymer revealed are not symmetrical. An HPB-b-PMMA where the ratio of molar mass of the blocks, M-n (HPB)/M-n (PMMA), is within 1.8-1.95 exhibits a much better interfacial activity in LDPE/PMMA blends than a copolymer of much lower ratio (longer PMMA block). This is ascribed to the much higher interactions (cohesive energy density) encountered in PMMA (PMMA of the copolymer and PMMA phase of the blend) compared with the LDPE side (HPB of the copolymer and LDPE phase of the blend). (c) 2005 Wiley Periodicals, Inc.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Harrats, Charef;  Katholieke Universiteit Leuven (KUL) > Department of Chemistry > Laboratory for Macromolecular Structural Chemistry
Jérôme, Robert ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Block balance in hydrogenated polybutadiene-b-polymethylmethacrylate diblock copolymer for efficient interfacial activity in low-density polyethylene/polymethylmethacrylate blend: Phase morphology development
Publication date :
01 April 2005
Journal title :
Journal of Polymer Science. Part B, Polymer Physics
ISSN :
0887-6266
eISSN :
1099-0488
Publisher :
John Wiley & Sons Inc, Hoboken, United States - New Jersey
Volume :
43
Issue :
7
Pages :
837-848
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 February 2009

Statistics


Number of views
74 (4 by ULiège)
Number of downloads
1 (1 by ULiège)

Scopus citations®
 
5
Scopus citations®
without self-citations
5
OpenCitations
 
5

Bibliography


Similar publications



Contact ORBi