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Citation: LIU Jing, PENG Hui, CHENG Shi-Yuan. Emulsion Copolymerization of Polysiloxane Macromonomer and Acrylates[J]. Chinese Journal of Applied Chemistry, ;2003, 20(8): 778-782. shu

Emulsion Copolymerization of Polysiloxane Macromonomer and Acrylates

1.
Institute of Chemistry and Materials Science, Hubei University, Wuhan 430062

Corresponding author: CHENG Shi-Yuan,
Received Date: 9 November 2002
Available Online: 12 May 2003

A series of emulsion with largest ω (Si-1800) up to 20% were prepared by emulsion copolymerization of vinyl terminal polysiloxane, acted as macromonomer cross linker, butyl acrylate and methyl methacrylate. The products were characterized by cross linking degree, IR analysis of the cross linked parts, conversion of the monomers, size and size distribution of the latex particles, water resistance and mechanical property of the latex film. The influence of reaction condition on the copolymerization has been discussed based on the morphological analysis of some latexes. The results showed that semi continuous feeding process improves the cross linking degree of products to 62.6%, whereas batch process to 11.6%. Feeding process of reagents and feeding time also show effects on the water absorption and mechanical property of latex film. Higher cross linking degree was obtained when more initiator was used. With the increase of ω (Si-1800), the break stress of the latex film dropped to 0.9 MPa while break elongation ascended to 62.6%, and water resistance property of latex film was improved.
- polysiloxane macromonomer,
- acrylates,
- emulsion polymerization,
- cross linking degree
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