Citation: Hua-yong Hu a, Jing Du a, Qing-bin Meng a, Zhan-yong Li a, Xiao-xia Zhu a, b. THERMOSENSITIVITY OF NARROW-DISPERSED POLY(N-n-PROPYLACRYLAMIDE) PREPARED BY ATOM TRANSFER RADICAL POLYMERIZATION[J]. Chinese Journal of Polymer Science, ;2008, 26(2): 187-194. shu

THERMOSENSITIVITY OF NARROW-DISPERSED POLY(N-n-PROPYLACRYLAMIDE) PREPARED BY ATOM TRANSFER RADICAL POLYMERIZATION

Received Date: 16 March 2007
Revised Date: 23 April 2007

Controlled polymerization of N-n-propylacrylamide was achieved by atom transfer radical polymerization (ATRP) in a N,N-dimethylformamide-water mixture (50 vol%) at room temperature with methyl 2-chloropropinonate as initiator and CuCl/tris(2-dimethylaminoethyl)amine as the catalytic system in a ratio of 1︰1︰1. High molecular weight homopolymers (up to 3.7 × 104) with narrow molecular weight distribution (less than 1.2) were obtained. The living character of the polymerization was further demonstrated by self-blocking experiment. An inverse molecular weight dependence of the cloud point of narrow-dispersed poly(N-n-propylacrylamide) aqueous solution was determined by turbidimetry and differential scanning calorimetry, especially for the low molecular weight samples.
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