Synthesis and thermal characterization of a one component maleimide-epoxy resin

White, LA; Weber, JW; Mathias, Lon J.

doi:10.1007/s002890170040

Cited by 14 publications

(9 citation statements)

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“…Modification of the chemical structure of these polymers by incorporation of a second reactive diluent (diallyl bisphenol A, acrylic elastomers, butadiene homopolymers) or by chemical transformation of polymeric chains, with the aim of enhancing properties, has received considerable attention from the research community. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] The objective of the present work is to report the results on the synthesis and cross-linking polymerization of multiallyl maleate resins, which possess many polymerizable carboncarbon double bonds with different reactivities, one of which is the vinylene groups of maleate types and the other is the allylic type, and their characterization by Fourier transform infrared (FT-IR) spectroscopy, NMR, and elemental analysis. Thermal properties of the cross-linked products were also investigated.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Multiallyl Maleate Resins from Epoxy Formaldehyde Resins

Mustaţă¹,

Bicu²

2008

Ind. Eng. Chem. Res.

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Formaldehyde resins at various molar ratios of monomers (aniline/o-cresol/cyclohexanone) were synthesized under acid catalysis. The resultant resins were reacted with a large excess of epichlorohydrin, and multifunctional epoxy formaldehyde resins were obtained. These resins were reacted with monoallyl ester of maleic acid in the presence of benzyltriethylammonium bromide as catalyst, and multiallyl maleate resins were obtained. The resins were characterized by elemental analysis and by spectroscopic methods (IR and NMR). The curing and decomposition behavior of cross-linked resins were studied by DSC and TGA techniques. The presence of allyl maleate as pendant groups on polymeric chains confers on them the improvement of the possibilities for obtaining thermosetting resin systems based on bismaleimide derivatives. The cross-linked products showed good thermal properties, high glass transitions, and low water absorption.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Multiallyl Maleate Resins from Epoxy Formaldehyde Resins

Mustaţă¹,

Bicu²

2008

Ind. Eng. Chem. Res.

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“…In addition, maleimide resins (usually bismaleimide compounds) are often cured by allyl chemicals for the purpose of improving toughness, and the modification of bismaleimide resin by allyl compounds seems to be one of the major development directions for this family of polymers. 8 Like maleic anhydride, maleimides also belong to the group of strong electron acceptor monomers. According to literature, many free radical copolymerization systems of styrene and N-phenyl maleimides formed alternating copolymers over a wide range of monomer feeds.…”

Section: Introductionmentioning

confidence: 99%

Preparation and glass transition temperature of hyperbranched poly[allyl methyl maleate‐co‐N‐propyl maleimide]

Liu

Wilén

2005

J of Applied Polymer Sci

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ABSTRACT:The kinetics and molecular weight averages of the hyperbranched polymers formed by the alternating copolymerization of equimolar allyl methyl maleate (AMM) and N-n-propyl maleimide (PMI) were investigated. The yields, molecular weight averages, and polydispersity indices as well as the branching degrees of the produced copolymers increased with increasing initiator concentrations and prolonged polymerization time. The trends of the experimental molecular weights as determined by size exclusion chromatography were in good agreement with the theoretical predictions. The molecular weight distribution indices fit the curve given by M w /M n ϭ 1/(1-x D ), and the molecular weights fit the curve given by M w ϭ 4076/ (1-x D ) 2 , where x D was the conversion of vinyl groups. DSC studies demonstrated a nonlinear relation of T g values to the reciprocal of molecular weight (M), and T g values decreased with the increase of molecular weight. For the T g values of highly branched polymers in high molecular weight range, a relation of T g ϭ T gϱ 0 ϩ k/M was obtained, where T gϱ 0 was obtained by extrapolating to infinite molecular weight and k was a constant. T gϱ 0 was 136°C, and k ϭ 2.9 for this work.

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“…However, due to their high cross‐link density, they are often brittle, resulting in low impact and fracture toughness 12. Introduction of a long, flexible epoxy chain into the backbone of bismaleimides is expected to reduce cross‐link density and also to improve fracture toughness by dissipating the impact energy along the entire molecular chain 13, 14…”

Section: Introductionmentioning

confidence: 99%

The maleimide modified epoxy resins for the preparation of UV‐curable hybrid coatings

Altıntaş

Karataş

Kayaman‐Apohan

et al. 2011

Polymers for Advanced Techs

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In the present study, maleimide-modified epoxide resin containing UV-curable hybrid coating materials were prepared and coated on polycarbonate substrates in order to improve their surface properties. UV-curable, bismaleimide-modified aliphatic epoxy resin was prepared from N-(p-carboxyphenyl) maleimide (p-CPMI) and cycloaliphatic epoxy (Cyracure-6107) resin. The structure of the bismaleimide modified aliphatic epoxy resin was analyzed by FTIR and the characteristic absorption band for maleimide ring was clearly observed at 3100 cm S1 . Silica sol was prepared from tetraethylorthosilicate (TEOS) and methacryloxy propyl trimethoxysilane (MAPTMS) by sol-gel method. The coating formulations with different compositions were prepared from UV-curable bismaleimide-based epoxy oligomer and sol-gel mixture. The molecular structure of the hybrid coating material was analyzed by 29 Si-CP/ MAS NMR spectroscopy techniques. In the 29 Si CP/MAS NMR spectrum of the hybrid coating, mainly two kinds of signals were observed at S68 and S110 ppm that correspond to T 3 and Q 4 peaks, respectively. This result shows that a fully condensed structure was obtained. The thermal and morphological properties of these coatings materials were investigated by using TGA and SEM techniques. Hardness and abrasion resistance properties of coating materials were examined and both were found to increase with sol-gel precursor content of the coating. The photopolymerization kinetics was investigated by using RT-IR. 70% conversion was attained with the addition of 15 wt% of BMI resin into the acrylate-based coating formulation. It was found that the UV-curable organic-inorganic hybrid coatings improved the surface properties of polycarbonate.

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Synthesis and thermal characterization of a one component maleimide-epoxy resin

Cited by 14 publications

References 0 publications

Synthesis and Properties of Multiallyl Maleate Resins from Epoxy Formaldehyde Resins

Synthesis and Properties of Multiallyl Maleate Resins from Epoxy Formaldehyde Resins

Preparation and glass transition temperature of hyperbranched poly[allyl methyl maleate‐co‐N‐propyl maleimide]

The maleimide modified epoxy resins for the preparation of UV‐curable hybrid coatings

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