Synthesis and Structure–Property Relations of Latexes Containing Graft Copolymers between Telechelic Polybutadiene and Dodecyl Methacrylate

Binh T. T. Pham; Robert G. Gilbert; Christopher M. Fellows

doi:10.1071/CH04030

RESEARCH ARTICLE

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Synthesis and Structure–Property Relations of Latexes Containing Graft Copolymers between Telechelic Polybutadiene and Dodecyl Methacrylate

Binh T. T. Pham ^A , Robert G. Gilbert ^A ^B and Christopher M. Fellows ^A

+ Author Affiliations

- Author Affiliations

^A Key Centre for Polymer Colloids, School of Chemistry F11, University of Sydney, Sydney NSW 2006, Australia.

^B Author to whom correspondence should be addressed (e-mail: gilbert@chem.usyd.edu.au).

Australian Journal of Chemistry 57(8) 765-777 https://doi.org/10.1071/CH04030
Submitted: 9 February 2004 Accepted: 26 April 2004 Published: 10 August 2004

Abstract

Latexes comprising novel copolymers were formed by second-stage emulsion polymerization of dodecyl methacrylate (DMA) onto a hydroxylated polybutadiene-based polyurethane prepolymer (PUD) as seed latex, with persulfate initiator. Morphology data from TEM imaging (including chemical fixation ultra-microtoming), glass transition temperature, dynamic mechanical analysis, and other mechanical-property data were all consistent with a system showing extensive grafting and compatibilization between the different polymeric components. Water adsorption and AFM measurements showed that samples with poorer film-forming properties had higher water sensitivity, greater mixing of the polymer phases, and poorer mechanical properties. These properties were related to a phase-inversion phenomenon occurring above a critical dodecyl methacrylate/prepolymer ratio. The compatibilization of the PUD and poly(DMA) given by these modifications resulted in a product with increased tackiness, although with a higher water sensitivity.

Acknowledgments

The Key Centre for Polymer Colloids is established and supported by the Australian Research Council’s Key Centres Program. We greatly appreciated the expertise and collaboration of the Electron Microscope Unit, University of Sydney. The support of B.T.T.P.’s Ph.D. by Atofina, and helpful interactions with Drs Denis Tembou Nzudie and Karine Loyen of that company, are gratefully acknowledged.

References

Synthesis and Structure–Property Relations of Latexes Containing Graft Copolymers between Telechelic Polybutadiene and Dodecyl Methacrylate

Abstract

Acknowledgments

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