GLASS TRANSITION BEHAVIOR OF THE SPIN-COATED THIN FILMS OF A HYDROPHILIC POLYMER ON THE SUPPORTED SUBSTRATES
writer：Xiaolin Lu*, Yongli Mi*
keywords：Glass transition, ellipsometry, spin-coating, hydrophilic polymers
source：期刊
specific source：Chinese Journal of Polymer Science,2015, 33, 607-612.
Issue time：2015年
Using ellipsometry, we 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 may 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.
http://link.springer.com/article/10.1007/s10118-015-1612-4