Tetrafunctional aliphatic epoxy I. Synthesis and characterization

Shih, Wei-Kuan; Chen‐Chi, M.

doi:10.1002/(sici)1097-4628(19980705)69:1<51::aid-app7>3.0.co;2-l

Cited by 36 publications

(16 citation statements)

References 5 publications

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“…Hydroxyl-terminated polydimethylsiloxane possesses high thermal and thermo-oxidative stability, high moisture resistance, good dielectric properties, and UV and chemical resistance (10)(11)(12)(13)(14)(15)(16)(17)(18). In our earlier work, it was observed ORDER…”

Section: Introductionmentioning

confidence: 97%

A Comparative Study of the Preparation and Characterization of Aromatic and Aliphatic Bismaleimides to Produce Modified Siliconized Epoxy Intercrosslinked Matrices for Engineering Applications

Alagar

Kumar

Rao

2001

Materials and Manufacturing Processes

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A novel hybrid intercrosslinked network of hydroxyl-terminated polydimethylsiloxane modified epoxy and bismaleimides [N,N′-bismaleimido-4,4′-diphenylmethane and 1,6-bis(maleimido)hexane] matrix systems were developed. Epoxy resin was modified with 5, 10, and 15% (wt%) of hydroxyl-terminated polydimethylsiloxane using γ-aminopropyltriethoxysilane as crosslinking agent and dibutyltindilaurate as catalyst. The reaction between hydroxyl-terminated polydimethylsiloxane and epoxy resin was confirmed by IR spectral studies. The siliconized epoxy systems were further modified with 5, 10, and 15% (wt%) of both aromatic and aliphatic bismaleimides separately. The castings and E-glass fiber-reinforced composites prepared were characterized for their mechanical properties. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) of the matrix samples were also performed to determine the glass transition temperature (T g ) and thermal degradation temperature of the hybrid intercrosslinked systems. Data obtained from mechanical studies and thermal characterization indicate that the introduction of 561 ORDER REPRINTS ALAGAR, KUMAR, AND RAOsiloxane into epoxy resin improves the toughness and thermal stability, with reduction in strength and modulus values. The incorporation of aromatic bismaleimide into epoxy resin improved both tensile strength and thermal properties, whereas it was observed that the incorporation up to 5% of aliphatic bismaleimide into epoxy resin decreased the stress-strain value and above 5% increased the strength properties. However, the introduction of both aromatic and aliphatic bismaleimides (aromatic and aliphatic) into siliconized epoxy resin influenced both mechanical and thermal properties according to the percentage content.

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Section: Introductionmentioning

confidence: 97%

A Comparative Study of the Preparation and Characterization of Aromatic and Aliphatic Bismaleimides to Produce Modified Siliconized Epoxy Intercrosslinked Matrices for Engineering Applications

Alagar

Kumar

Rao

2001

Materials and Manufacturing Processes

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“…Epoxy resins, the most common and important thermosetting polymers, have been used extensively in industry, as coating, adhesives, composite matrix, etc., due to their excellent comprehensive properties. Multifunctional epoxy systems are of particular interest, largely because of their high temperature capabilities and mechanical properties . Multifunctional glycidyl amine type epoxy resins, mainly represented by tetra‐functional one N,N,N′,N′ ‐tetraglycidyl‐4,4′diaminodiphenylmethane (TGDDM) and tri‐functional one triglycidyl para‐aminophenol (TGPAP), are included in the most important multifunctional epoxy resins.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and properties of low viscosity tetra‐functional epoxy resin N,N,N′,N′‐ tetraglycidyl‐3,3′‐diethyl‐4,4′‐diaminodiphenylmethane

Zheng

Zhao

Yang

et al. 2013

J of Applied Polymer Sci

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Tetra-functional epoxy resin N,N,N 0 ,N 0 -tetraglycidyl-3,3 0 -diethyl-4,4 0 -diaminodiphenylmethane (TGDEDDM) was synthesized and characterized. The viscosity of TGDEDDM at 25 C was 7.2 PaÁs, much lower than that of N,N,N 0 ,N 0 -tetraglycidyl-4,4 0 -diaminodiphenylmethane (TGDDM). DSC analysis revealed that the reactivity of TGDEDDM with curing agent 4,4 0 -diamino diphenylsulfone (DDS) was significantly lower than that of TGDDM. Owing to its lower viscosity and reactivity, TGDEDDM/DDS exhibited a much wider processing temperature window compared to TGDDM/DDS. Trifluoroborane ethylamine complex (BF 3 -MEA) was used to promote the curing of TGDEDDM/DDS to achieve a full cure, and the thermal and mechanical properties of the cured TGDEDDM were investigated and compared with those of the cured TGDDM. It transpired that, due to the introduction of ethyl groups, the heat resistance and flexural strength were reduced, while the modulus was enhanced. V C 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40009.

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“…Conventionally, the introduction of siloxane into polymers has been carried out through blending methods. The blending of siloxane and epoxy monomers causes an increase in viscosity of the blended resin [19]. It may also cause phase separation and release of siloxane component [20].…”

Section: Introductionmentioning

confidence: 99%

Thermal stability of hybrid materials based on epoxy functional (poly)siloxanes

Maciejewski

Dąbek

Fiedorow

et al. 2011

J Therm Anal Calorim

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Epoxy functional (poly)siloxanes are one of the most important classes of modified silicones. Due to high reactivity of epoxy group and specific features of siloxane chain, they can make an excellent raw material for synthesis of hybrid materials. Results obtained in this study have shown that both the modification of epoxy resins with epoxy functional disiloxanes as well as the application of polysiloxanes with long polysiloxane chains and a specified content of epoxy groups makes it possible to produce hybrid materials of very good thermal stability. Crosslinking reactions were carried out with use of four diamines of which the best one appeared to be 4,4 0-diaminodiphenylmethane. The highest thermal stability was found in the case of hybrid materials obtained from epoxy functional polysiloxanes.

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Tetrafunctional aliphatic epoxy I. Synthesis and characterization

Cited by 36 publications

References 5 publications

A Comparative Study of the Preparation and Characterization of Aromatic and Aliphatic Bismaleimides to Produce Modified Siliconized Epoxy Intercrosslinked Matrices for Engineering Applications

A Comparative Study of the Preparation and Characterization of Aromatic and Aliphatic Bismaleimides to Produce Modified Siliconized Epoxy Intercrosslinked Matrices for Engineering Applications

Synthesis, characterization, and properties of low viscosity tetra‐functional epoxy resin N,N,N′,N′‐ tetraglycidyl‐3,3′‐diethyl‐4,4′‐diaminodiphenylmethane

Thermal stability of hybrid materials based on epoxy functional (poly)siloxanes

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