Studies of the polymerization of diallyl compounds—XLIII. Microheterogeneous copolymerization of diallyl terephthalate with vinyl monomers having long-chain alkyl groups
✍ Scribed by Akira Matsumoto; Masaya Kurokawa; Masayoshi Oiwa
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 258 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
Abstraet--Diallyl terephthalate (DAT) was radically copolymerized in benzene with vinyl monomers having long-chain alkyl groups, including lauryl methacrylate (LMA), stearyl methacrylate (SMA) and vinyl laurate (VL). In the DAT LMA copolymerizations, the initial rate was quite high because of high polymerizability of LMA compared with DAT. The gel point was at a higher conversion than in DAT homopolymerization. The LMA content in the copolymer decreased rapidly with the conversion up to the gel point; beyond the gel point, the LMA content in the soluble portion increased markedly with the progress of gelation. These tendencies were more pronounced in the DAT-SMA copolymerization. The reversed conversion dependence of the composition of precopolymer and sol at the gel point and the delayed gelation were not observed in the DAT-VL copolymerization. The change of the composition distribution of copolymer with progress of copolymerization was followed by comparison of r.i.-and u.v.-monitored GPC curves. These results are discussed from the standpoint of microheterogeneous copolymerization.