Journal
EUROPEAN POLYMER JOURNAL
Volume 46, Issue 2, Pages 217-225Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2009.10.028
Keywords
Hyperbranched polymer; Poly(siloxysilane); Macroinitiator; Hyperbranched-linear star block copolymer; Atom transfer radical polymerization (ATRP)
Categories
Ask authors/readers for more resources
Hyperbranched-linear star block copolymers, hyperbranched poly(siloxysilane)-block-polystyrene (HBPS-b-PSt), were prepared by atom transfer radical polymerization (ATRP) of styrene in xylene, using bromoester-terminated HBPS (HBPS-Br (P3), M-n = 7500, M-w/ M-n = 1.76) as a macroinitiator. The number-average molecular weights of the obtained polymers (M-n) were in the range of 21,800-60,000 and molecular weight distributions were unimodal throughout the reaction (M-w/M-n = 1.28-1.40). These polymers showed 5 wt.% decomposition temperature (T-d5) over 300 degrees C. The DSC thermograms of the resulting polymers indicated two glass transition temperatures (T-g). The T-g of HBPS segment shifted to higher value while the T-g of PSt segment shifted to lower value compared with those of the homopolymers. Preliminary physical characterization related to the solution viscosity of the resulting block copolymers is also reported. (C) 2010 Published by Elsevier Ltd.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available