Composition of the continuous phase in partially miscible blends of epoxy resin and epoxidized rubber by dynamic mechanical analysis

Bussi, Philippe; Ishida, Hatsuo

doi:10.1016/0032-3861(94)90939-3

Cited by 45 publications

(26 citation statements)

References 18 publications

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“…[33][34][35] Also, when the thermosetting resin is modified with a thermoplastic resin or a reactive elastomer to improve the toughness, the cured resin forms a phase-separated structure, and this is accompanied by a decrease in T g value. [36][37][38] In contrast to these reports, despite the compatibility of PR with BMI/DABPA resin, the fracture toughness and impact resistance were both increased and T g was not decreased by modification with PR. Figure 8 shows the results for the lap shear adhesive strength of BMI/DABPA/PR alloy.…”

Section: Mechanical Properties Of Bmi/dabpa/pr Alloymentioning

confidence: 68%

“…In general, when a modifier compatible with a thermosetting resin is blended in order to improve the toughness and impact resistance of a resin such as BMI, the toughness is improved but the T g value is lowered significantly . Also, when the thermosetting resin is modified with a thermoplastic resin or a reactive elastomer to improve the toughness, the cured resin forms a phase‐separated structure, and this is accompanied by a decrease in T g value . In contrast to these reports, despite the compatibility of PR with BMI/DABPA resin, the fracture toughness and impact resistance were both increased and T g was not decreased by modification with PR.…”

Section: Resultsmentioning

confidence: 94%

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Properties of bismaleimide resin modified with polyrotaxane as a stress relaxation material

Ohtsuka

Zhao²

2018

Polymer International

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In this study, 4,4′‐diphenylmethane bismaleimide (BMI)/2,2′‐diallylbisphenol A (DABPA) resin was modified with polyrotaxane (PR) as a stress relaxation material. Based on a dynamic mechanical analysis and various properties of the cured resin, the influence of the motion of PR on the cured properties of BMI/DABPA/PR alloy is discussed. The cyclic molecule α‐cyclodextrin (α‐CD) that is threaded onto the PR axis contains a methacryl group in its side chain that reacts with the allyl group of BMI/DABPA resin. The methacryl group of PR reacted with the allyl group of BMI/DABPA matrix resin to form a transparent and dense network structure, so that the glass transition temperature was increased with increasing PR concentration. In addition, the toughness, impact resistance and adhesiveness of BMI/DABPA resin were improved by modification with PR. These results indicate that the poly(ethylene glycol) chain, which is the axial polymer of the PR, moves in the space formed by the cavities of the threaded α‐CD and the surrounding BMI/DABPA resin matrix in the glassy state, thereby relaxing the internal stress applied to BMI/DABPA/PR resin. The range of applications of BMI/DABPA resin modified with PR may expand into fields requiring high heat resistance in addition to excellent toughness and adhesiveness. © 2018 Society of Chemical Industry

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Section: Mechanical Properties Of Bmi/dabpa/pr Alloymentioning

confidence: 68%

Section: Resultsmentioning

confidence: 94%

Properties of bismaleimide resin modified with polyrotaxane as a stress relaxation material

Ohtsuka

Zhao²

2018

Polymer International

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“…For an epoxy resin plasticized by an internally epoxidized polybutadiene rubber, a value of k ϭ 2.0 was reported. 12,13 An increase in the k value corresponds to an increase in T g E Ϫ T g (higher plasticization effect). Let us assume that a T g of 330 K is acceptable for a particular application of the plasticized epoxy, for example, for a coating, adhesive, or sealant.…”

Section: Epoxy/anhydride Network Modified By Siohfunctionalized Oligmentioning

confidence: 99%

Epoxy/anhydride networks modified by epoxy/anhydride oligomers containing SiOH groups

Mauri

Riccardi

Williams

2000

J. Appl. Polym. Sci.

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Epoxy/anhydride oligomers containing variable amounts of trialkoxysilane groups were synthesized from phenyl glycidyl ether (PGE), 3-glycidoxypropyl trimethoxysilane (GPMS), and methyl tetrahydrophthalic anhydride (MTHPA), using benzyldimethylamine (BDMA) as an initiator. They were hydrolyzed and partially condensed using diluted formic as a catalyst, with the last step carried out in a solution of diglycidyl ether of bisphenol A (DGEBA). By curing with a stoichiometric amount of MTHPA, in the presence of BDMA, plasticized epoxy/anhydride networks were obtained without any evidence of phase separation. These materials showed a better abrasion resistance than that of the neat matrix. The presence of free SiOH groups can be used to improve the adhesion to glass surfaces.

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“…[17][18][19] This phenomenon is caused by the formation of homogeneously dispersed particles during curing cycle. The mechanical energy is uniformly distributed by the rubber particles, reducing the local stress concentration.…”

Section: Carbon Fiber-epoxy Composites Containing Htpb Dispersed In Tmentioning

confidence: 99%

The effect of hydroxyl-terminated polybutadiene-grafted carbon fiber on the impact performance of carbon fiber-epoxy resin composites

Barcia

Soares

Gorelova

et al. 1999

J. Appl. Polym. Sci.

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Carbon fiber (CF) containing 1.4 and 2.1 mmol/g of -COOH and -OH groups, respectively, was functionalized by using an excess of tolylene-2,4-diisocyanate. The NCO-modified CF was submitted to a graft reaction with hydroxyl-terminated polybutadiene (HTPB). The HTPB-grafted carbon fiber was employed as reinforcing agent for epoxy resin-based composites. The presence of the flexible HTPB at the interface between the fiber and the matrix resulted in a substantial improvement on impact strength. Additional improvement on toughness was achieved by using epoxy matrix containing dispersed phase of HTPB. The composite morphology was also studied by scanning electron microscopy.

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Composition of the continuous phase in partially miscible blends of epoxy resin and epoxidized rubber by dynamic mechanical analysis

Cited by 45 publications

References 18 publications

Properties of bismaleimide resin modified with polyrotaxane as a stress relaxation material

Properties of bismaleimide resin modified with polyrotaxane as a stress relaxation material

Epoxy/anhydride networks modified by epoxy/anhydride oligomers containing SiOH groups

The effect of hydroxyl-terminated polybutadiene-grafted carbon fiber on the impact performance of carbon fiber-epoxy resin composites

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