A STUDY OF SOLUTION POLYMERIZATION OF POLYPHOSPHAZENES

被引：77

作者：

MUJUMDAR, AN ^{[1
]}

YOUNG, SG ^{[1
]}

MERKER, RL ^{[1
]}

MAGILL, JH ^{[1
]}

机构：

[1] UNIV PITTSBURGH,DEPT MAT SCI & ENGN,PITTSBURGH,PA 15261

来源：

MACROMOLECULES | 1990年 / 23卷 / 01期

关键词：

D O I：

10.1021/ma00203a004

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Several alkoxy/aryloxy-substituted phosphazene polymers [P(OR)2=N]n(R = CH3, C6H5, C6H4CH3, CH2CF3, C6H4C6H5, C6H4C1, C6H4Br, C8H10) were prepared by the reaction of poly(dichlorophosphazene) with their corresponding sodium salts. The poly(dichlorophosphazene) was obtained by the solution polymerization of hexachlorocyclotriphosphazene in 1,2,4-trichlorobenzene. Sulfamic acid and ammonium sulfamate were used as catalysts. Apparently sulfamic acid functions as a catalyst through its acid group in some decomposed form. Toluenesulfonic acid and sulfobenzoic acid were new catalysts developed for solution polymerization. The polymerization favors a cationic mechanism. Promoters were found to speed up to polymerization reaction. Effects of different parameters including dilution, catalyst concentration, and promoter concentration on the properties of the final polymer were investigated. The changes in molecular weight and molecular weight distribution of the polymer as a function of polymerization reaction time were noted. The nucleophilic reaction was studied, and the effect of reaction time and temperature on the properties of the final polymer was investigated. Ring opening on fully substituted cyclotriphosphazenes at elevated pressures and temperatures was unsuccessful. The polymers were characterized by differential scanning calorimetry, gel permeation chromatography, infrared spectroscopy, and 31P solution nuclear magnetic resonance spectroscopy. © 1990, American Chemical Society. All rights reserved.

引用

页码：14 / 21

页数：8

共 25 条

[1] .21. SERIES ON PHOSPHORUS-NITROGEN COMPOUNDS - POLYMERIZATION OF HEXACHLOROCYCLOTRIPHOSPHAZENE - ROLE OF PHOSPHORUS-PENTACHLORIDE, WATER, AND HYDROGEN-CHLORIDE [J].

ALLCOCK, HR ;

GARDNER, JE ;

SMELTZ, KM .

MACROMOLECULES, 1975, 8 (01) :36-42

[2] PHOSPHONITRILIC COMPOUNDS .6. HIGH MOLECULAR WEIGHT POLY(ALKOXY- AND ARYLOXPHOSPHAZENES) [J].

ALLCOCK, HR ;

KUGEL, RL ;

VALAN, KJ .

INORGANIC CHEMISTRY, 1966, 5 (10) :1709-&

[3] PHOSPHONITRILIC COMPOUNDS .I. MECHANISM OF PHOSPHONITRILIC CHLORIDE POLYMERIZATION CAPACITANCE CONDUCTANCE + ELECTRON-SPIN RESONANCE STUDIES [J].

ALLCOCK, HR ;

BEST, RJ .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1964, 42 (02) :447-&

[4]

ALLOCK HR, 1980, POLYM PREPR AM CHEM, V21, P111

[5]

CHAKRABORTY D, 1962, J POLYM SCI, V62, P130

[6] APPLICATION OF RAMAN AND LASER-LIGHT SCATTERING TO THE SOLUTION POLYMERIZATION OF HEXACHLOROCYCLOTRIPHOSPHAZENE .2. [J].

CHU, B ;

LEE, DC .

MACROMOLECULES, 1986, 19 (06) :1592-1603

[7] POLYMER MORPHOLOGY OF POLY[BIS(TRIFLUOROETHOXY)PHOSPHAZENE], [NP(OCH2CF3)2]N [J].

FERRAR, WT ;

MARSHALL, AS ;

WHITEFIELD, J .

MACROMOLECULES, 1987, 20 (02) :317-322

[8] SERIES ON STUDIES OF PHOSPHAZENE .32. NEW INITIATORS FOR THE RING-OPENING THERMAL POLYMERIZATION OF HEXACHLOROCYCLOTRIPHOSPHAZENE - SYNTHESIS OF LINEAR POLY(DICHLOROPHOSPHAZENE) IN HIGH YIELDS [J].

GANAPATHIAPPAN, S ;

DHATHATHREYAN, KS ;

KRISHNAMURTHY, SS .

MACROMOLECULES, 1987, 20 (07) :1501-1505

[9] POLYDICHLOROPHOSPHAZENE POLYMERIZATION STUDIES [J].

HAGNAUER, GL .

JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY, 1981, A16 (01) :385-408

[10]

HAGNAUER GL, 1972, J POLYM SCI A2, V10, P669

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