STAR BRANCHED POLYSTYRENES - AN EVALUATION OF SOLVENT AND TEMPERATURE INFLUENCES ON UNPERTURBED CHAIN DIMENSIONS

被引：19

作者：

MAYS, JW ^{[1
]}

HADJICHRISTIDIS, N ^{[1
]}

FETTERS, LJ ^{[1
]}

机构：

[1] EXXON RES & ENGN CO,SCI LABS,CORP RES,ANNANDALE,NJ 08801

来源：

POLYMER | 1988年 / 29卷 / 04期

关键词：

Solvents--Mixing - Thermal Effects - Viscosity--Measurements;

D O I：

10.1016/0032-3861(88)90084-5

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Temperature coefficients of unperturbed dimensions of three high molecular weight polystyrene stars have been evaluated from intrinsic viscosity measurements in six theta solvents and two solvent/nonsolvent mixtures over a temperature range of 10 to 70°C. Larger values of unperturbd dimensions were found in cyclic aliphatic solvents than in chloroalkanes at similar temperatures. Negative values of the temperature coefficient of unperturbed dimensions were found in both solvent series, values which were in essential agreement with those found for linear polystyrene. The values of the branching index, g′, were found to be independent of both temperature and solvent type.

引用

页码：680 / 685

页数：6

共 61 条

[1] VISCOMETRIC BEHAVIOR OF POLYSTYRENE IN TETRALIN CYCLOHEXANE MIXTURES [J].

ABDELAZIM, AAA ;

HUGLIN, MB .

POLYMER, 1983, 24 (11) :1429-1433

[2]

ABE A, 1970, POLYM J, V1, P232

[3] EFFECTS OF FLOW-RATE AND COLUMN COMBINATION ON SEPARATION EFFICIENCY IN MULTI-COLUMN GEL-PERMEATION CHROMATOGRAPHY [J].

AMBLER, MR ;

FETTERS, LJ ;

KESTEN, Y .

JOURNAL OF APPLIED POLYMER SCIENCE, 1977, 21 (09) :2439-2451

[4]

[Anonymous], 1963, J POLYM SCI C, DOI [DOI 10.1002/POLC.5070010109, 10.1002/polc.5070010109]

[5] STAR-BRANCHED POLYMERS .5. THE O-TEMPERATURE DEPRESSION FOR 8-ARM AND 12-ARM POLYISOPRENES IN DIOXANE [J].

BAUER, BJ ;

HADJICHRISTIDIS, N ;

FETTERS, LJ ;

ROOVERS, JEL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1980, 102 (07) :2410-2413

[6] THE INFLUENCE OF TEMPERATURE ON THE VISCOSITY OF POLYSTYRENE SOLUTIONS [J].

BIANCHI, U ;

MAGNASCO, V .

JOURNAL OF POLYMER SCIENCE, 1959, 41 (138) :177-187

[7]

BIRSHTEIN TM, 1986, POLYMER, V27, P1079

[8]

BURCHARD W, 1961, MAKROMOLEKUL CHEM, V50, P20

[9] NEW THEORETICAL APPROACH TO PROBLEM OF SOLUTION BEHAVIOR OF BRANCHED POLYMERS [J].

CANDAU, F ;

BENOIT, H ;

REMPP, P .

MACROMOLECULES, 1972, 5 (05) :627-&

[10]

CANDAU F, 1971, MAKROMOLEKUL CHEM, V149, P41

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