Citation: Xiao-lin Lu, Yong-li Mi. Glass Transition Behavior of Spin-coated Thin Films of a Hydrophilic Polymer on Supported Substrates[J]. Chinese Journal of Polymer Science, ;2015, 33(4): 607-612. doi: 10.1007/s10118-015-1612-4 shu

Glass Transition Behavior of Spin-coated Thin Films of a Hydrophilic Polymer on Supported Substrates

Xiao-lin Lu ¹ ,
Yong-li Mi ²

1.
2.
Department of Chemical and Biomolecular Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowllon, Hong Kong, China

Received Date: 30 July 2014
Revised Date: 31 August 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 51173169 and 21004054), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, Human Resources, and Social Security Bureau of Zhejiang Province, China and the Priority Academic Program Development of Jiangsu Higher Education Institutions, China (PAPD 1107037001).

Using ellipsometry, it is found the glass transition temperature of the spin-coated polyacrylamide (PAL) thin films on the supported silicon (Si) substrates with an oxide layer decreases with decreasing the film thickness. But Tgs of the as-prepared thin films are much higher than that of the bulk sample. Such observations can be attributed to the combined result of the surface effect and increased hydrogen bonding interaction between PAL chains due to spin coating/thin film confinement.
- Tg,
- Thin film,
- Hydrophilic polymer,
- Ellipsometry
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