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- W2052173893 abstract "Abstract The paper describes the homopolymerisation and copolymerisation of N‐isopropyl acrylamide (NIPAM) with glycidyl methacrylate (GMA) in solution at 60°C using azobisisobutyronitrile (AIBN) as an initiator and dioxan as solvent. Copolymers were synthesized by varying the mol fraction of GMA in the initial feed from 0.025‐0.125. All the polymerization reactions were terminated at low % conversion (10‐15%) and the copolymer composition was determined by measuring the epoxy content. Percent epoxy content was determined by titration method using pyridine‐HCl mixture. The reactivity ratios determined using Fineman‐Ross method were found to be 0.94±0.05 (r 1 , NIPAM) and 1.05±0.08 (r 2 , GMA). All the polymers have high molecular weights with wide molecular weight distribution as determined by gel permeation chromatography (GPC) i.e. M n in the range of 3.7 x 10 4 ‐ 7.8 x 10 4 and M w in the range of 1.2 x 10 5 ‐ 4.1 x 10 5 with a polydispersity index in the range of 2.3‐5.3. Lower critical solution temperature (LCST) of NIPAM homopolymer and copolymers was determined by recording DSC scans of polymers in aqueous solution. Incorporation of GMA in the poly(NIPAM) backbone resulted in a decrease in the LCST." @default.
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- W2052173893 date "2004-03-01" @default.
- W2052173893 modified "2023-09-27" @default.
- W2052173893 title "Studies on the copolymerisation of N-isopropyl-acrylamide with glycidyl methacrylate" @default.
- W2052173893 doi "https://doi.org/10.1002/masy.200450606" @default.
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