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Epoxy-modiWed, unsaturated polyester hybrid networks
| Content Provider | CUSAT-Thesis |
|---|---|
| Author | Eby Thomas, Thachil Lity, Alen Varghese Benny Cherian, A. |
| Abstract | Hybrid polymer networks (HPNs) based on unsaturated polyester resin (UPR) and epoxy resins were synthesized byreactive blending. The epoxy resins used were epoxidised phenolic novolac (EPN), epoxidised cresol novolac (ECN) anddiglycidyl ether of bisphenol A (DGEBA). Epoxy novolacs were prepared by glycidylation of the novolacs using epichlorohydrin.The physical, mechanical, and thermal properties of the cured blends were compared with those of the control resin.Epoxy resins show good miscibility and compatibility with the UPR resin on blending and the co-cured resin showed substantialimprovement in the toughness and impact resistance. Considerable enhancement of tensile strength and toughnessare noticed at very low loading of EPN. Thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA) anddiVerential scanning calorimetry (DSC) were employed to study the thermal properties of the toughened resin. The EPN/UPR blends showed substantial improvement in thermal stability as evident from TGA and damping data. The fracturebehaviour was corroborated by scanning electron microscopy (SEM). The performance of EPN is found to be superior toother epoxy resins |
| File Format | |
| Language | English |
| Publisher | ELSEVIER |
| Access Restriction | Open |
| Subject Keyword | Epoxidised phenolic novolac resins Epoxidised cresol novolac resins Hybrid polymer networks Impact resistance Toughness Unsaturated polyester resin |
| Content Type | Text |
| Resource Type | Article |