EFFECTS OF SOLVENT ON MODEL COPOLYMERIZATION REACTIONS - A C-13-NMR STUDY

被引：12

作者：

KRSTINA, J ^{[1
]}

MOAD, G ^{[1
]}

SOLOMON, DH ^{[1
]}

机构：

[1] CSIRO,DIV CHEM & POLYMERS,PRIVATE BAG 10,CLAYTON,VIC 3168,AUSTRALIA

来源：

EUROPEAN POLYMER JOURNAL | 1992年 / 28卷 / 03期

关键词：

D O I：

10.1016/0014-3057(92)90189-9

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Relative reactivities of methyl methacrylate (MMA) styrene and vinyl acetate (VAc) towards the 2-methyl-2-(methoxycarbonyl)ethyl (1) and cyanoisopropyl (2) radicals have been determined in three solvents (benzene, ethyl acetate and methanol). The experiments involved C-13-NMR analysis of the C-13-labelled end-groups of copolymers formed with either azo-bis-(methylisobutyrate-alpha-C-13) or azo-bis-(isobutyronitrile-alpha-C-13) as initiator. Relative reactivities of styrene vs MMA and MMA vs VAc were the same in benzene and ethyl acetate. Use of methanol as solvent was found to enhance slightly the relative reactivity of styrene vs MMA towards both radicals. The significance of these results is discussed in relation to the mechanism by which solvents modify reactivity ratios in radical copolymerization.

引用

页码：275 / 282

页数：8

共 44 条

[1] TEMPERATURE-DEPENDENCE OF RATE AND CROSS-TERMINATION PROCESSES IN FREE-RADICAL COPOLYMERIZATION [J].

BALARAMAN, KS ;

KULKARNI, BD ;

MASHELKAR, RA .

JOURNAL OF POLYMER SCIENCE PART C-POLYMER LETTERS, 1982, 20 (09) :487-494

[2]

BAMFORD CH, 1967, MAKROMOLEKUL CHEM, V105, P122

[3]

BARTON J, 1988, COMPLEXES FREE RADIC

[4] REACTIONS OF THE 2-CYANO-2-PROPYL RADICAL WITH VINYL-ACETATE AND OTHER MONOMERS - A STUDY OF HEAD-ADDITION [J].

BEVINGTON, JC ;

BREUER, SW ;

HESELTINE, ENJ ;

HUCKERBY, TN ;

VARMA, SC .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1987, 25 (04) :1085-1092

[5] REACTIVITIES OF MONOMERS TOWARDS THE 2-CYANO-2-PROPYL RADICAL AT 100-DEGREES [J].

BEVINGTON, JC ;

HUCKERBY, TN ;

VARMA, SC .

EUROPEAN POLYMER JOURNAL, 1986, 22 (06) :427-430

[6] AN APPRAISAL OF NMR METHODS FOR STUDY OF END-GROUPS DERIVED FROM INITIATORS IN RADICAL POLYMERIZATIONS [J].

BEVINGTON, JC ;

EBDON, JR ;

HUCKERBY, TN .

EUROPEAN POLYMER JOURNAL, 1985, 21 (08) :685-694

[7]

BEVINGTON JC, 1984, POLYM COMMUN, V25, P260

[8] REACTIVITIES OF MONOMERS TOWARD THE 2-CYANO-2-PROPYL RADICAL BY NMR-STUDY OF END GROUPS IN COPOLYMERS [J].

BEVINGTON, JC ;

HUCKERBY, TN ;

HUTTON, NWE .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1982, 20 (09) :2655-2660

[9] RADICAL POLYMERIZATIONS INVOLVING ESTERS OF VINYL ALCOHOL .2. COPOLYMERIZATIONS [J].

BEVINGTON, JC ;

JOHNSON, M .

EUROPEAN POLYMER JOURNAL, 1968, 4 (06) :669-+

[10] THE SELF-REACTIONS OF 1-METHOXYCARBONYL-1-METHYLETHYL AND HIGHER ESTER RADICALS - COMBINATION VS DISPROPORTIONATION AND OLIGOMERIC PRODUCTS FROM SECONDARY REACTIONS [J].

BIZILJ, S ;

KELLY, DP ;

SERELIS, AK ;

SOLOMON, DH ;

WHITE, KE .

AUSTRALIAN JOURNAL OF CHEMISTRY, 1985, 38 (11) :1657-1673

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