【作者】 金东吉；

【导师】 金日光；

【作者基本信息】 北京化工大学 ， 高分子材料， 1995， 博士

【摘要】 本论文考察了DGEBA型环氧树脂对尼龙6和甲基丙烯酸甲酯—丁二烯—苯乙烯(MBS)核—壳冲击改性剂的相容性影响。在尼龙6／MBS共混物中加入DGEBA环氧树脂后，考察了体系熔融流变性能、结晶性能、冲击性能、相态、及机械性能的变化情况。 为了获得超韧尼龙混合物，MBS冲击改性剂必须均匀地分散于尼龙基体中，或者与尼龙其体发生化学交联，由于尼龙6与MBS外壳之间没有相容性，MBS粒子不能很好地分散于尼龙其体中。而加入可以与MBS外壳相容也可以与尼龙6基体发生化学反应的适当聚合物可以解决这个问题。DGEBA环氧树脂则满足这种要求。 实验证明Phenoxy环氧树脂与PMMA，而PMMA是MBS核一壳冲击改性剂外壳的主要成分。Phenoxy环氧树脂的主链段与DGEBA环氧树脂的主链段是相同的，所以DGEBA环氧树脂可以用作尼龙／MBS混合物的相容剂。通过DSC实验，PMMA—Phenoxy共混物的Gorden—Taylor方程K参数为0.2—1之间，表明PMMA—Phenoxy共混物之间的相互作用力不强。傅立叶红外光谱则用于追踪PMMA—Phenoxy共混物之间的相互作用力。当Phenoxy与PMMA混合时，随着PMMA用量增加，Phenoxy的宽幅氢键羟基谱带向高频方向移动，表明PMMA的羰基与Phenoxy的羟基的氢键相互作用是此共混物的主要动力。 Brabender实验结果证明了DGEBA环氧树脂的环氧环与尼龙基体相互作用。实验表明，随着DGEBA用量的增加，三元共混物的转矩增加。 TEM和SEM亚微相态表明混入DGEBA环氧树脂后，MBS颗粒均匀地分散于尼龙6基体中。 加入DGEBA环氧树脂后获得了超韧尼龙6／MBS混合物，但加入DGEBA环氧树脂用量大于5％后，冲击强度则下降。这种现象可能由于更多还原

【Abstract】 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更多还原