Citation: . A HYBRID POLYMER GEL AND ITS STATIC NONERGODICITY*[J]. Chinese Journal of Polymer Science, ;2002, 20(3): 269-274. shu

A HYBRID POLYMER GEL AND ITS STATIC NONERGODICITY*

Received Date: 18 October 2001
Revised Date: 28 November 2001

We used a thermally reversible hybrid gel made of billions of physically jam-packed swollen thermally sensitivepoly(N-isopropyl-acrylamide) chemical microgels. Laser light scattering study on a series of such hybrid gels formed atdifferent gelling rates and temperatures revealed that the position-dependence of the scattering speckle pattern(staticnonergodicity) came from large voids formed during the sol-gel transition. With a proper preparation, such a nonergodicity could be completely removed indicating that the static nonergodicity generally observed in a gel is not intrinsic,but comes from the clustering"island" structure formed during the gelation process.
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