The Compatibilizing Effect Of Diglycidyl Ether Of Bisphenol A (DGEBA) Epoxy Resin On The Blends Of Nylon-6 And Core-Shell Impact Modifier And Its Toughening Mechanism

The compatibilizing effects of diglycidyl ether of bisphenol — A (DGEBA) epoxy resin on the blend of nylon —6 and methyl methacylate — butadiene — styrene (MBS) core —shell inpact modifier were investigated. The change in melt rhelogy, crystallnity, impact strength , morphology and mechanical behavior associated with the addition of DGEBA epoxy resin on the nylon — 6/MBS blend were documented.In order to acheive super —tough nylon blend, MBS impact modifier must be uniformly dispersed in, or be chemically coupled to the nylon matrix. Because no miscibility between the nylon — 6 and shell of the MBS impact modifier existed, the proper dispersion of MBS particles in the nylon matrix could not be acheived. the addition of appropriate polymer that was miscible with the PMMA shell of the MBS impact modifier but which could also reacted with the nylon—6 matrix could offered solution. DGEBA type epoxy resin was proved to meet both criteria.Phenoxy resin was found to be miscible with the PMMA resin, which was the major component of the MBS core—shell impact modifier . The main segment of the Phenoxy resin was identical as the main segment of DGEBA epoxy resin,which was used as a compatibilizer in nylon— 6/MBS blends. From the D. S. C experiment ,the K parameter of the Gorden — Taylor equation in PMMA — Phenoxy blend was found to be in the range between 0. 2 and 1, suggesting that PMMA—Phenoxy interaction was not strong . Fourier transform infrared (F. T. I. R)was employed to trace the interaction forces in PMMA — Phenoxy blend. When the Phenoxy was mixed with PMMA,the broad hydrogen bonded hydroxyl band of Phenoxy was observed to shift to higher frequencies as a function of PMMA concentration,suggesting that the hydrogen bonding between the carbonyl groups of the PMMA and hydroxyl groups of the Phenoxy was the main driving force for the miscibility of this blend pairs.The brabender test results verified the chemical reaction between...