# EFFECT OF SILICA SOL-MODIFIED NANO-CALCIUM CARBONATE ON POLYURETHANE(UREA) DISPERSIONS AND THEIR FILMS

> Title: EFFECT OF SILICA SOL-MODIFIED NANO-CALCIUM CARBONATE ON POLYURETHANE(UREA) DISPERSIONS AND THEIR FILMS Page Range: p.395-400 Author(s): Yang Dongya; Qiu Fengxian File size: Download the pdf (subscribers only) Buy the pdf (non-subscribers) Journal: Polymers and Polymer Composites Issue Year: ppc Volume: 16...

Canonical URL: https://polymerjournals.com/effect-of-silica-sol-modified-nano-calcium-carbonate-on-polyurethaneurea-dispersions-and-their-films/
Published: 2008-06-01T00:00:00+00:00
Categories: Polymers and Polymer Composites

**Title: EFFECT OF SILICA SOL-MODIFIED NANO-CALCIUM CARBONATE ON POLYURETHANE(UREA) DISPERSIONS AND THEIR FILMS**
 Page Range: p.395-400
 Author(s): Yang Dongya; Qiu Fengxian
 File size:
 ![](http://dload.gif) [Download the pdf](http://journals.asp?Page=111&JournalDownload=ON&JournalType=ppc&JournalIssue=ppc16-6&JournalID=100458&JIP=) (subscribers only)
 ![](http://handbuy.gif) Buy the pdf (non-subscribers)
 Journal: Polymers and Polymer Composites
 Issue Year: ppc
 Volume: 16
 Issue No: No.6

**Abstract**
 An in situ dispersion method was used and described for the preparation of nanocomposites of polyurethane-urea (PUU) and silica sol modified calcium carbonate. The dispersions were characterised using Fourier transform infrared spectroscopy, transmission electron microscopy, and rheological measurements. It was observed that filler nanoparticles were dispersed within the PUU matrix and laid onto the PUU particles. At filler levels of less than 15 percent, the dispersions showed pseudoplastic behaviour. Films prepared from the dispersions were evaluated for their tensile properties and water contact angle, and showed improved water resistance and mechanical properties. 18 refs.

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