Polymer Dynamics in Epoxy/Alumina Nanocomposites Studied by Various Techniques

被引：20
|
作者：
Kyritsis, Apostolos [1 ]
Vikelis, Georgios [1 ]
Maroulas, Panayiotis [1 ]
Pissis, Polycarpos [1 ]
Milosheva, Boryana [2 ]
Kotsilkova, Rumiana [2 ]
Toplijska, Antonia [2 ]
Silvestre, Clara [3 ]
Duraccio, Donatella [3 ]
机构：
[1] Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece
[2] Bulgarian Acad Sci, Cent Lab Physicochem Mech, BG-1113 Sofia, Bulgaria
[3] CNR, Inst Chem & Technol Polymers, I-80078 Pozzuoli, NA, Italy
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2011年 / 121卷 / 06期
关键词：
epoxy/alumina nanocomposites; boehmite; polymer dynamics; glass transition; dielectric properties; DIELECTRIC-RELAXATION SPECTROSCOPY; BOEHMITE ALUMINA NANOCOMPOSITES; GLASS-TRANSITION TEMPERATURE; MOLECULAR-DYNAMICS; BEHAVIOR; REINFORCEMENT; CONFINEMENT; COMPOSITES; MORPHOLOGY; NETWORKS;
D O I：
10.1002/app.34161
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Epoxy/alumina nanocomposites of various compositions were prepared by dispersing modified and nonmodified boehmite nanoparticles in diglycidyl ether of bisphenol-A using diethylenetriamine as curing agent. Measurements of the viscosity of the nanodispersions provided information on particle-particle and particle-resin interactions. The structure of the nanocomposites was studied by scanning electron microscopy on fractured samples. Effects of nanoparticles on polymer dynamics was studied in detail by dynamic mechanical thermal analysis and two dielectric techniques, broadband dielectric relaxation spectroscopy and thermally stimulated depolarization currents. Three secondary relaxations, c, b, and x, the segmental a relaxation associated with the glass transition, and an interfacial relaxation, in the order of increasing frequency/decreasing temperature, were observed and studied. A correlation between viscosity (of the nanodispersions), storage modulus, glass transition temperature, real part of dielectric permittivity, and ductility of the nanocomposites was observed. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 3613-3627, 2011
引用
收藏
页码：3613 / 3627
页数：15
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