書誌事項
- タイトル別名
-
- Syntheses and Polymerizations of Unsaturated Dibasic Acid Derivatives
- XII. Homopolymerizations of N-(4-substituted phenyl) Maleimides
- 第12報N-(4-置換フェニル) マレイミド類の単独重合
抄録
The homopolymerizations of N-(4-substituted phenyl) maleimides, _??_(X: OCH3, CH3, H, Cl, OCOCH3, COOC2H5, COCH3) were carried out with azobisisobutyronitrile as an initiator in dimethylformamide.<BR>In the equation which expresses the initial rate of polymerization, <BR>Rp=k[AIBN]x[M]v<BR>the values of x and y were found to be in the range of 0.6-0.9 and 1.0-1.5, respectively, according to the monomer. Also the over-all activation energies and the frequency factors were measured to be 23.8-29.1 kcal/mole and 6.6×1013-6.6×1017.<BR>The relationship between logarithm of initial rate of polymerization (Rp) and σ of Hammett's equation did not give a straight line, the initial rates being greater than expected from the equation for electron releasing substituents and smaller for electron attracting substituents. The above curve was converted to a straight line by applying the Yamamoto- Otsu's equation, which contains a correcting term concerning resonance effects as compared with Hammett's equation. Thus the relationships between the reactivities of N-(4-substituted phenyl) maleimides in the copolymerization with vinyl acetate or methyl methacrylate and those in the homopolymerizations were explained.<BR>The anionic polymerizations of the above monomers were carried out with n-BuLi or C2H5ONa as initiator in tetrahydrofuran. With n-BuLi initiator the polymeryield was high but the reduced viscosity was found to be about 0.07 which corresponded to oligomers.
収録刊行物
-
- 高分子化學
-
高分子化學 26 (290), 393-400, 1969
公益社団法人 高分子学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282681495971200
-
- NII論文ID
- 130004032798
-
- ISSN
- 18848079
- 00232556
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可