Formation and properties of elastomer-modified epoxy resins

Samejima, Hiroshi; Fukuzawa, Takao; Toda, Hideo; Saga, Motoo

doi:10.1021/i300009a004

Cited by 6 publications

(3 citation statements)

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“…On the contrary, phase separation at gelation was suppressed at high vinylbenzyl glycidyl ether contents and the rubber remained dissolved into the matrix. Samejima et al (65) used a poly(ether-ester) rubber to improve the thermal shock resistance of a low molecular weight bisphenol-A resin. The authors did not report on the initial compatibility of their system.…”

Section: Compatible-incomdatible Amroachmentioning

confidence: 99%

Toughness of epoxies modified by preformed acrylic rubber particles

Levita

Marchetti²,

Lazzeri³

1991

Makromolekulare Chemie. Macromolecular Symposia

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A bisphenol-A diglycidyl ether resin, cured with isophoronediamine at 6OOC. was modifled by means of preformed core-shell acrylic rubber particles. Blends with rubber contents u p to 30 phr by wt were tested. The fracture toughness depended linearly on the amount of rubber and significant improvement was found. No deterioration of temperature resistance was also observed. The viscosity of resin/modifier mixtures was controlled by means of antifoaming a ents. A comparison with liquid acrylonitrilebutadiene copcfymers showed that core-shell particles are efflcacious tougheners. The effect of a bimodal particle size distribution was considered. In the size range investigated (0.2+5pn) no synergic effect was observed. 0 1991 Hiithig & Wepf Verlag, Basel CCC 0258-0322/91/$02.00

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Section: Compatible-incomdatible Amroachmentioning

confidence: 99%

Toughness of epoxies modified by preformed acrylic rubber particles

Levita

Marchetti²,

Lazzeri³

1991

Makromolekulare Chemie. Macromolecular Symposia

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“…The second sharp step of around 40-50% arises due to the breakdown of the polymer backbone, together with loss of NH 2 and other side groups present in the polymer. The last step corresponds to the decomposition of carbon as CO 2 [25]. The typical DTA curves for blank and some modified epoxies are given in Figures 1 and 2.…”

Section: Resultsmentioning

confidence: 99%

“…Dunomekes with reference to ASTM standard on an IZOD make ATS FAARSA, Italy. The dimensions of the sample chosen were according to ASTM D256-0 standard [20][21][22][23][24][25].…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Novel Epoxy Resin Networks with High Impact Strength and Hardness

Athawale

Alhousami

2008

Journal of Reinforced Plastics and Composites

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Novel epoxy resins with high impact strength and hardness have been synthesized by the bulk polymerization method. These materials were modified with styrene, polymethylmethacrylate, methylmethacrylate, and acrylonitrile to obtain both thermoplastic and thermosetting resins. Physical properties of the resulting mixtures were evaluated by measuring the impact strength, hardness and the degree of compression. Thermograms were used to investigate the behavior of different curing agents with resins. Comparison of results of modified epoxy resin with blank epoxy resin reveals that modified resins show remarkably high glass transition temperatures and thermal stability, as well as hardness. These materials exhibit a higher degree of solvent resistance.

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The mechanical properties of rubber‐modified vinyl esters

Liao

Chu

Tong

1988

J of Applied Polymer Sci

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Synopsis"Vinyl esters" were prepared by reacting an epoxy resin (DGEBA) with acrylic and methacrylic acids, modified with Hycar VTBN, and cured at 90°C for 4 h with t-butyl perbenzoate. The resultant materials showed a two-phase structure in electron micrographs and dynamic mechanical spectra. The domain of the dispersed phase was estimated to be on the order of 10 nm in size. Infrared spectroscopy indicated extensive copolymerization of the internal double bonds or pendant vinyl groups in VTBN during the cure of the resin. The mechanical properties of the modified materials were measured, and the differences in mechanical behavior between the acrylic and methacrylic vinyl esters were discussed

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Formation and properties of elastomer-modified epoxy resins

Cited by 6 publications

References 0 publications

Toughness of epoxies modified by preformed acrylic rubber particles

Toughness of epoxies modified by preformed acrylic rubber particles

Novel Epoxy Resin Networks with High Impact Strength and Hardness

The mechanical properties of rubber‐modified vinyl esters

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