Oligomeric poly(ethylene oxide)-functionalized silsesquioxanes:: Interfacial effects on Tg, Tm, and ΔHm

被引：74
作者：
Maitra, P [1 ]
Wunder, SL [1 ]
机构：
[1] Temple Univ, Dept Chem, Philadelphia, PA 19122 USA
来源：
CHEMISTRY OF MATERIALS | 2002年 / 14卷 / 11期
关键词：
D O I：
10.1021/cm0203518
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polyethyene oxide (PEO) oligomers (CH3-(O-CH2CH2)n-, where n = 2, 4, 〈8〉, and 〈12.5〉, and the brackets denote Mn averages) have been attached to Q8M8H silsesquioxanes to form Q8M8PEO(n). The effect of the inorganic interface is to raise the glass transition temperature, Tg, and suppress the crystallization of the PEO oligomers. With increasing n, Tg increases, and the PEO becomes semicrystalline, suggesting that PEO segments close to the interface remain amorphous.
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页码：4494 / 4497
页数：4
相关论文
共 37 条
[1]  
Armand M. B., 1979, Fast Ion Transport in Solids. Electrodes and Electrolytes, P131
[2]   Novel cation conductors based on rigid-rod poly(p-phenylene)s [J].
Baum, P ;
Meyer, WH ;
Wegner, G .
POLYMER, 2000, 41 (03) :965-973
[3]   MICROSCOPIC INVESTIGATION OF IONIC-CONDUCTIVITY IN ALKALI-METAL SALTS POLY(ETHYLENE OXIDE) ADDUCTS [J].
BERTHIER, C ;
GORECKI, W ;
MINIER, M ;
ARMAND, MB ;
CHABAGNO, JM ;
RIGAUD, P .
SOLID STATE IONICS, 1983, 11 (01) :91-95
[4]   Thermal properties of the homologous series of 8-fold alkyl-substituted octasilsesquioxanes [J].
Bolln, C ;
Tsuchida, A ;
Frey, H ;
Mulhaupt, R .
CHEMISTRY OF MATERIALS, 1997, 9 (06) :1475-1479
[5]   Organic/inorganic nanocomposite star polymers via atom transfer radical polymerization of methyl methacrylate using octafunctional silsesquioxane cores [J].
Costa, ROR ;
Vasconcelos, WL ;
Tamaki, R ;
Laine, RM .
MACROMOLECULES, 2001, 34 (16) :5398-5407
[6]   EFFECT OF SIDE-CHAIN LENGTH AND CROSS-LINKING ON THE AC CONDUCTIVITY OF OLIGO(ETHYLENEOXIDE) COMB-BRANCH POLYMER-SALT MIXTURES [J].
COWIE, JMG ;
SADAGHIANIZADEH, K .
SOLID STATE IONICS, 1990, 42 (3-4) :243-249
[7]  
Crivello JV, 1997, J POLYM SCI POL CHEM, V35, P407
[8]  
FEYER FF, 1989, J AM CHEM SOC, V111, P1741
[9]   Siloxyaluminate polymers with high Li+ ion conductivity [J].
Fujinami, T ;
Tokimune, A ;
Mehta, MA ;
Shriver, DF ;
Rawsky, GC .
CHEMISTRY OF MATERIALS, 1997, 9 (10) :2236-2239
[10]   Hybrid organic-inorganic thermoplastics: Styryl-based polyhedral oligomeric silsesquioxane polymers [J].
Haddad, TS ;
Lichtenhan, JD .
MACROMOLECULES, 1996, 29 (22) :7302-7304
1234