Hybrid epoxy networks from ethoxysilyl-modified hyperbranched poly(ethyleneimine) and inorganic reactive precursors

被引：8

作者：

Acebo, Cristina ^{[1
]}

Fernandez-Francos, Xavier ^{[1
]}

Santos, Jose-Ignacio ^{[2
]}

Messori, Massimo ^{[3
]}

Ramis, Xavier ^{[4
]}

Serra, Angels ^{[1
]}

机构：

[1] Univ Rovira & Virgili, Dept Analyt & Organ Chem, E-43007 Tarragona, Spain

[2] SGIKER UPV EHU, NMR Facil, Joxe Mari Korta Ctr, Donostia San Sebastian 20018, Spain

[3] Univ Modena & Reggio Emilia, Dipartimento Ingn Enzo Ferrari, I-41125 Modena, Italy

[4] Univ Politecn Cataluna, ETSEIB, Thermodynam Lab, E-08028 Barcelona, Spain

来源：

EUROPEAN POLYMER JOURNAL | 2015年 / 70卷

关键词：

Hyperbranched polymers; Epoxy resin; Sol-gel; Coatings; Hybrids; SCRATCH-RESISTANCE; NANOCOMPOSITES; COATINGS; THERMOSETS; SILICA; ENHANCEMENT; POLYMER; RESINS; POLYESTERS; BEHAVIOR;

D O I：

10.1016/j.eurpolymj.2015.06.029

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

New epoxy-silica hybrid coatings were prepared by a dual process consisting of a sol-gel process using tetraethoxysilane (TEOS) or 3-glycidyloxypropyl trimethoxysilane (GPTMS) in the presence of hyperbranched poly(ethyleneimine) with ethoxysilyl groups at the chain ends (PEI-Si) followed by a homopolymerization of diglycidylether of bisphenol A (DGEBA) using 1-methylimidazole (1-MI) as anionic initiator. The influence of the amount of TEOS and GPTMS in the characteristics of the coating was examined. Thin transparent films were obtained and their morphology was observed by transmission electron microscopy (TEM). The hydrolytic condensation was confirmed by Si-29 NMR studies. Cage-like nanometric structures were formed in case of adding GPTMS and bigger silica particles on adding TEOS to the formulation. Thermal stability was evaluated by thermogravimetry and the scratch resistance properties were also investigated, showing an improvement in resistance to break and to detachment in all the coatings containing GPTMS. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：18 / 27

页数：10

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