Polysiloxanes polymers with hyperbranched structure and multivinyl functionality

Zheng, Yu, Thurecht, Kristofer J. and Wang, Wenxin (2011) Polysiloxanes polymers with hyperbranched structure and multivinyl functionality. Journal of Polymer Science Part A: Polymer Chemistry, Article in press 4: 1-9. doi:10.1002/pola.25072

Author Zheng, Yu
Thurecht, Kristofer J.
Wang, Wenxin
Title Polysiloxanes polymers with hyperbranched structure and multivinyl functionality
Journal name Journal of Polymer Science Part A: Polymer Chemistry   Check publisher's open access policy
ISSN 0887-624X
Publication date 2011
Sub-type Article (original research)
DOI 10.1002/pola.25072
Volume Article in press
Issue 4
Start page 1
End page 9
Total pages 9
Place of publication Hoboken, NJ, United States
Publisher John Wiley & Sons
Collection year 2012
Language eng
Abstract Hyperbranched polysiloxane polymers with multivinyl functionality were designed and synthesized through a “one-step and one-pot” deactivation enhanced atom transfer polymerization (DE-ATRP) approach from the copolymerization of polydimethylsiloxane (PDMS) macromonomers and divinylbenzene (DVB). Various feed ratios of siloxane-based monomer and divinyl monomers were investigated. We showed that even at DVB concentrations as high as 80 mol % in the feed, 65% yield of hyperbranched polymer could be obtained without gelation because the DE-ATRP suppressed the rapid formation of macronetwork structures. The molecular weight, polydispersity, macromolecular structure of hyperbranched poly(DVB-co-PDMS) as well as its viscosity in silicone oil were characterized by GPC-MALLS, 1H NMR and rheometer. By tracking the relationship between the radius of gyration, elution volume and molecular weight from MALLS analysis, solid evidences of the highly branched and condensed structure of the polymers were obtained. Furthermore, the oil thickening experiments demonstrate that this hyperbranched polymer can act as a well-controlled viscosity-modifier for Silicone oils, which potentially will have important application in coating, cosmetic and pharmaceutical products.
Keyword ATRP
Curing of polymer
Functionalization of polymer
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article first published online ahead of print: 16 November 2011

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Created: Tue, 06 Dec 2011, 09:51:58 EST by Sandrine Ducrot on behalf of Centre for Advanced Imaging