# PREPARATION AND SURFACE PROPERTIES OF SILOXANE-ACRYLATE COPOLYMER WITH HIGH SILOXANE CONTENT

> Title: PREPARATION AND SURFACE PROPERTIES OF SILOXANE-ACRYLATE COPOLYMER WITH HIGH SILOXANE CONTENT Page Range: p.495-502 Author(s): Xiaobo Deng; Shunsheng Cao; Bailing Liu; Rong Luo; Hualin Chen File size: 157K Download the pdf (subscribers only) Buy the pdf (non-subscribers) Journal: Polymers and Polymer...

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Published: 2006-05-01T00:00:00+00:00
Categories: Polymers and Polymer Composites

**Title: PREPARATION AND SURFACE PROPERTIES OF SILOXANE-ACRYLATE COPOLYMER WITH HIGH SILOXANE CONTENT**
 Page Range: p.495-502
 Author(s): Xiaobo Deng; Shunsheng Cao; Bailing Liu; Rong Luo; Hualin Chen
 File size: 157K
 ![](http://dload.gif) [Download the pdf](http://journals.asp?Page=111&JournalDownload=ON&JournalType=ppc&JournalIssue=ppc14-5&JournalID=100303&JIP=) (subscribers only)
 ![](http://handbuy.gif) Buy the pdf (non-subscribers)
 Journal: Polymers and Polymer Composites
 Issue Year: ppc
 Volume: 14
 Issue No: No. 5

**Abstract**
 Latices of siloxane-acrylate copolymer find wide application due to their non-toxic and non-contaminating character, and interest has been shown to combine acrylate with siloxane in order to obtain stable polymer latices and other polymer materials with improved performance. It is known that the more siloxane in the copolymer, the better the properties, but since the polymerisation temperature of the acrylate is higher than 80 deg.C and under such conditions the Si (OCH”3)”3 groups are easy to hydrolyse, forming siloxane bonds and then proceeding to form a network structure and coagulum. This is the main reason that the siloxane content of the copolymer could not be enhanced during polymerisation. To overcome this, an oxidation-reduction initiator was introduced into the system, which could initiate the reaction at relatively low temperatures. In addition, sodium bicarbonate was added when the pH fell below 6.5. Under these conditions, the acrylate-siloxane copolymers were prepared by emulsion polymerisation in which the siloxane content could reach 30%. The latex properties of the copolymer were characterised by FTIR spectroscopy and the use of a surface tension analyser. It was shown that almost all the monomer had participated in the copolymerisation. Results of characterisation by the surface tension analyser showed that the introduction of organic siloxane could decrease the surface tension values greatly. Surface properties were also studied by the static contact angle method. Compared with the acrylate homopolymer, the copolymer containing 3-(methacryloxypropyltrimethoxysilane) was capable of making an increase in water repellency. 29 refs.

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