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http://hdl.handle.net/2074/2482
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| Title: | Copolymerization of methyl methacrylate and urethane methacrylate—II |
| Authors: | Tyagi, Alok Kumar
Choudhary, Veena
Varma, I K |
| Keywords: | Photopolymerization
Omopolymerization
Tetrahydrofuran
Copolymer compositions |
| Issue Date: | 1992 |
| Citation: | European Polymer Journal,28(4), 423-425 |
| Abstract: | A methacrylate monomer (MAUN) having a pendant urethane linkage was prepared by reacting tolylene diisocyanate (TDI), 2-naphthol and 2-hydroxyethyl methacrylate (HEMA). Photopolymerization in the absence of photosensitizer in the temperature range 32 to 62° was investigated using differential photocalorimetry. The activation energy for photopolymerization was found to be 20.4 kJ/mol. Homopolymerization and copolymerizations of MAUN with MMA were also carried out in tetrahydrofuran at 60° using benzoyl peroxide as initiator. The reactivity ratios determined from copolymer compositions derived from nitrogen contents were 0.2 ± 0.1 (MMA) and 5.6 ± 0.3 (MAUN) indicating that the copolymer was enriched in MAUN relative to the feed. The effect of copolymer composition on thermal stability in nitrogen was also evaluated. |
| URI: | http://eprint.iitd.ac.in/dspace/handle/2074/2482 |
| Appears in Collections: | Centre for Polymer Science and Engineering [CPSE]
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