The fracture of an epoxy polymer containing elastomeric modifiers

Bascom, W. D.; Ting, Robert Y.; Moulton, Richard J.; Riew, C. K.; Siebert, A. R.

doi:10.1007/bf00552947

Cited by 34 publications

(27 citation statements)

References 13 publications

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“…Although the incorporation of imide linkages in epoxy resins imparts stiffness to some extent, which in turn improved their thermal stability and adhesive strength at elevated temperatures, epoxy-imides are generally brittle in nature, which limits their room temperature adhesive strength. Usually the brittleness of epoxy resins is reduced by the addition of rubber toughening agents like epoxidized hydroxyl-terminated polybutadiene (EHTPB) [26], and carboxyl-terminated butadiene acrylonitrile copolymer (CTBN) [27][28][29][30][31][32]. Thus, it would be of interest to study the modification of epoxy-imide resins with reactive liquid=solid rubbers.…”

Section: Introductionmentioning

confidence: 99%

Epoxy-Imide Resins from N-(4- and 3-Carboxyphenyl) Trimellitimides: Modified with Reactive Rubbers

Abraham

Packirisamy

Ramaswamy

et al. 2005

International Journal of Polymeric Materials

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Epoxy-imide resins obtained through the reaction of epoxy resins such as Araldite 1 GY 250=Araldite 1 EPN 1138 with N-(4-and 3-carboxyphenyl)trimellitimides (IDA-I and IDA-II, respectively) have been modified with 10 wt% of epoxidized hydroxyl-terminated polybutadiene (EHTPB), 10 phr of carboxyl-terminated butadiene-acrylonitrile liquid copolymer (CTBN-L), and 10 phr of carboxyl-terminated butadiene-acrylonitrile solid copolymer (CTBN-S) without sacrificing much of their performance at elevated temperatures. Adhesive lap shear strength on stainless steel substrate at room temperature and at 100, 125, and 150 C has been evaluated for the modified and unmodified systems. CTBN-S offers a remarkable increase of 13 MPa and 8 MPa in the room temperature adhesive strength of GY 250-based system and EPN 1138-based system, respectively. EHTPB gives only a marginal improvement and CTBN-L offers an improvement by 4 MPa for GY 250-based system whereas CTBN-L reduces the adhesive strength of EPN 1138-based system. SEM studies suggest that in general, the modification with EHTPB and CTBN-L results only in improving the ductility of epoxy-imide systems, whereas the modification with CTBN-S results in phase separation of rubber particles in the epoxy-imide matrix.

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Section: Introductionmentioning

confidence: 99%

Epoxy-Imide Resins from N-(4- and 3-Carboxyphenyl) Trimellitimides: Modified with Reactive Rubbers

Abraham

Packirisamy

Ramaswamy

et al. 2005

International Journal of Polymeric Materials

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“…Figure (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) show the compression curves of the first group (UPS:NR) as a function of NR and observed the compression value decreases with increases the ratio NR of the polymer blend composite . the reason to the polymer blend composite metal Gained plasticity property (UPS:PMMA) as a function PMMA , observed the compression value decreases with increases the ratio the PMMA in to polymer blend composite .…”

Section: Compression Testmentioning

confidence: 99%

“…[6] . Preliminary studies on rubber modified resin reported only modest increases in fracture toughness; however, as the technology developed, more significant increases in toughness were obtained [ 7,8 ] . In more recent years, it has been shown that the toughness can be increased by more than an order of magnitude over that of the unmodified resin [9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano (Y2O3 ) on the Mechanical Properties of the (PS:NR:PMMA) Polymer Blend Composite

Bdaiwi¹

2017

djps

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Study of the mechanical properties of polymer blend composite to the preparation of matrix Unsaturated Polyester resin (UPS) with natural rubber (NR) and polymethyl methacrylate (UPS:NR:PMMA) material and study influence Nano Yttrium Oxide (Y2O3) on the composite . The first group is the preparation of samples of the mixture of polyester matrix with natural rubber material in ratio certain, It was examined the mechanical properties: tensile, flexure at break, young modules, hardness and compression decreases with increases the natural Rubber ratio but Elongation test increases when increases Rubber ratio. The second group is the samples preparation of the mixture of polyester with PMMA material, test mechanical properties decreases with increases the PMMA ratio. Third group was prepared from a mixture of polymer blend composite, which consists of fixed ratios of polyester, natural rubber and PMMA. Addition of Nano material Y2O3 at ratio (0.25-1.5) wt% .result test mechanical properties increases with increases the Y2O3 ratio.

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“…A number of mechanisms, such as cavitation of the toughener phase, debonding at the interface between the toughener phase and the matrix, and generation of massive crazing, can serve to dissipate the tri-axial tension. So far, however, only the cavitation of the toughener phase has been examined in detail [14][15][16][17][18][19][20][21][22][23]. In rigid-rigid polymer alloys, cavitation of the toughener (dispersed) phase may not be a viable mechanism for dissipation of triaxial tension.…”

Section: Introductionmentioning

confidence: 99%

Toughening mechanisms in a multi-phase alloy of nylon 6,6/polyphenylene oxide

1989

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Toughening mechanisms in a nylon 6,6/polyphenylene oxide (PA/PPO) alloy are studied. This alloy consists of well dispersed PPO particles (containing an elastomeric phase) in a PA matrix. Both crazing and shear yielding mechanisms are found to be sequentially operative in this alloy. When a crack propagates in the material, a crazed zone forms ahead of the crack tip. This crazed zone then transforms into a shear yielded zone as the crack propagates through it. The crazes inside the original crazed zone are closed or distorted by the shear yielding process. In the transformed region, the shear yielded material is oriented at different angles as the crack propagates. These findings are consistent with the notion that hydrostatic tension has to be dissipated in order for the remaining deviatoric stress to reach the critical value for yielding. It is possible to partially attribute the increase in toughness to both crack blunting and zone shielding mechanisms.

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The fracture of an epoxy polymer containing elastomeric modifiers

Cited by 34 publications

References 13 publications

Epoxy-Imide Resins from N-(4- and 3-Carboxyphenyl) Trimellitimides: Modified with Reactive Rubbers

Epoxy-Imide Resins from N-(4- and 3-Carboxyphenyl) Trimellitimides: Modified with Reactive Rubbers

Effect of Nano (Y2O3 ) on the Mechanical Properties of the (PS:NR:PMMA) Polymer Blend Composite

Toughening mechanisms in a multi-phase alloy of nylon 6,6/polyphenylene oxide

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