NUCLEAR-MAGNETIC-RESONANCE APPROACH TO PROPERTIES OF POLY(ETHYLENE OXIDE) POLY(METHYL METHACRYLATE) BLENDS .1. CHAIN DYNAMICS AND FREE-VOLUME

被引：10

作者：

BROSSEAU, C

GUILLERMO, A

COHENADDAD, JP

机构：

[1] Laboratoire de Spectrométrie Physique Laboratoire associé au CNRS, Université Joseph Fourier, 38402 Saint-Martin-d'Heres Cedex

来源：

POLYMER | 1992年 / 33卷 / 10期

关键词：

POLY(ETHYLENE OXIDE); POLY(METHYL METHACRYLATE); BLENDS; POLYMER DYNAMICS; NUCLEAR MAGNETIC RELAXATION;

D O I：

10.1016/0032-3861(92)90873-U

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Nuclear magnetic resonance relaxation-time measurements performed on poly (ethylene oxide)-deuteriated poly(methyl methacrylate) blends of low-molecular-weight components were analysed as functions of concentration-PHI and temperature T. A number of results can be derived from the homogeneity properties of the transverse relaxation functions M(x)(t, PHI, T). The temperature dependence of poly (ethylene oxide) proton relaxation times in the blend is found to obey a Williams-Landel-Ferry equation with a temperature reference T*(PHI) = T(g)(PHI) + 50 K, T(g)(PHI) being the glass transition temperature of the blend. It is shown that the transverse magnetization dynamics is concentration-independent at the reference temperature T*(PHI). The dependence of transverse relaxation upon temperature and poly(ethylene oxide) molecular weight provides qualitative information about the terminal relaxation spectrum.

引用

页码：2076 / 2083

页数：8

共 26 条

[1]

[Anonymous], 1980, VISCOELASTIC PROPERT

[2] EFFECTS OF CHAIN MICROSTRUCTURE ON THE VISCOELASTIC PROPERTIES OF LINEAR POLYMER MELTS - POLYBUTADIENES AND HYDROGENATED POLYBUTADIENES [J].

CARELLA, JM ;

GRAESSLEY, WW ;

FETTERS, LJ .

MACROMOLECULES, 1984, 17 (12) :2775-2786

[3] EFFECT OF ANISOTROPIC CHAIN MOTION IN MOLTEN POLYMERS - SOLID-LIKE CONTRIBUTION OF NONZERO AVERAGE DIPOLAR COUPLING TO NMR SIGNALS - THEORETICAL DESCRIPTION [J].

COHENADDAD, JP .

JOURNAL OF CHEMICAL PHYSICS, 1974, 60 (06) :2440-2453

[4] SINGLE CHAIN DIFFUSION PROCESS AND PROTON MAGNETIC-RELAXATION IN POLYMER MELTS [J].

COHENADDAD, JP .

JOURNAL DE PHYSIQUE, 1982, 43 (10) :1509-1528

[5] NUCLEAR MAGNETIC-RESONANCE APPROACH TO FRACTAL CHAIN STRUCTURE IN MOLTEN POLYMERS AND GELS - CHARACTERIZATION METHOD OF THE SPIN-SYSTEM RESPONSE [J].

COHENADDAD, JP ;

SCHMIT, C .

POLYMER, 1988, 29 (05) :883-893

[6] BREAKDOWN OF TIME TEMPERATURE SUPERPOSITION IN MISCIBLE POLYMER BLENDS [J].

COLBY, RH .

POLYMER, 1989, 30 (07) :1275-1278

[7]

DOI M, 1987, MACROMOLECULES, V20, P1900, DOI 10.1021/ma00174a035

[8]

DOI M, 1978, J CHEM SOC FARAD T 2, V74, P1818, DOI 10.1039/f29787401818

[9]

Flory P. J., 1953, PRINCIPLES POLYM CHE

[10] ENTANGLEMENT INTERACTIONS IN POLYMERS AND THE CHAIN CONTOUR CONCENTRATION [J].

GRAESSLEY, WW ;

EDWARDS, SF .

POLYMER, 1981, 22 (10) :1329-1334

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