树脂合金化改性环氧树脂研究

综述了环氧树脂的树脂合金化增韧改性,着重讨论了热塑性树脂、热致液晶聚合物和互穿网络结构等环氧树脂增韧改性新技术。     

晶须镁盐/POE/聚丙烯共混体系力学性能的研究

采用晶须镁盐、POE、聚丙烯（PP）研制改性PP复合材料；讨论了晶须镁盐和增韧剂POE改性PP的机理；对改性PP进行了力学性能测试；分析了改性PP的微观结构。实验结果表明，晶须镁盐和POE并用能对PP产生良好的增韧增强作用。     

有机玻璃的增韧研究

研究了不同聚合方法制备的聚丙烯酸丁酯（PBA）对浇铸型有机玻璃（PMMA）的增韧改性，研究结果表明，当PBA以纳米粒子簇分散在PMMA基体中时，对PMMA有较好的增韧改性效果。当PMMA中无皂乳液聚合PBA（e-PBA)的质量分数为0.5%时。改性PMMA的冲击强度比基体提高38%。SEM观察表明，本体聚合PBA（b-PBA)橡胶粒子以独特的纳米簇状结构均匀分布在PMMA基体中，大量的微裂纹以b-PBA粒子为中心呈放射状向外辐射，这些微裂纹在试样破坏的过程中吸收了大量的冲击能，使改性PMMA韧性得以提高。     

基体韧性对PS改性PVC体系性能的影响

研究了PS对未增韧PVC体系及用CPE预增韧PVC体系韧性的影响,发现在用CPE预增韧PVC基体后,PS的增韧效果更为显著,但增韧机理井无改变,仍可用"空穴增韧"的机理来解释。     

无卤阻燃高抗冲聚苯乙烯的研制

研究了纳米改性氢氧化铝（CG-ATH）、改性聚苯醚（MPPO）和红磷母料对高抗冲聚苯乙烯（HIPS）的阻燃作用及SBS对所得阻燃材料的增韧作用，得到了具有良好阻燃性能和物理机械性能的复合材料。结果表明，CG-ATH和MPPO与红磷母料之间有很好的协效阻燃作用，配合使用可以使HIPS的垂直燃烧达到FV-0级，氧指数达到27．5％，但是所得复合材料的冲击强度较低。SBS对复合材料有很好的增韧作用，可以使冲击强度提高一倍以上，并且不影响复合材料的阻燃性能。     

PC/PBT合金增韧改性的研究

研究了“核-壳”结构的丙烯酸酯类(ACR)抗冲改性剂对PC／PBT(80／20)合金力学性能和耐热性的影响；并用扫描电子显微镜对共混物的微观形态结构进行了分析。结果表明：随ACR抗冲改性剂的增加，共混物的冲击强度先增后降，当ACR的用量为15份时，出现最大值；同时共混物的拉伸强度和维卡软化温度都降低。     

HDPE/E-TMB共混物熔体的流变行为研究

用自制增韧母料(ETMB)与高密度聚乙烯(HDPE)通过热机械共混制得增韧高密度聚乙烯(HDPE/ETMB)共混物,用高压毛细管流变仪对此类共混物的流变行为进行了研究。结果表明,HDPE/ETMB共混物为假塑性流体;表观粘度随剪切速率和切应力的增大而减小,并随温度的升高而降低;粘流活化能随剪切速率的增大和母料中乙丙弹性体含量的增加均呈逐渐减小的趋势。     

Effects of perfluoroether concentration and curing protocol on morphology and mechanical properties of toughened TGDDM/MNA resin systems

Previous published work has shown that hydroxyl terminated perfluoroether oligomers can be suitably modified and functionalised to make them miscible with epoxy resins in the uncured state. The reaction conditions can adjusted to induce phase separation either through spinodal decomposition to produce an IPN type morphology, or by nucleation and growth if a dispersed-particle microstructure is required.In the present work we examine the relative toughening enhancement efficiency of the two possible heterophase morphologies. Both systems show a sigmoidal increase in fracture toughness, with increasing concentration of the perfluoroether modifier. However, this takes place at much lower modifier concentrations for the systems with a particulate morphology (about 3.5% w/w) than for IPN systems (about 7.5% w/w). The maximum fracture toughness achievable for the two systems, on the other hand, is very similar and coincides with the concentration at which co-continuous phases are formed.These differences in morphology, however, are not reflected in the variation of modulus and compressive yield strength with increasing concentration of perfluoroether modifier, in so far as both systems exhibit a gradual and small reduction in property with increasing concentration. Furthermore, the dynamic mechanical spectra of the two systems are very different, but the changes resulting from increasing the concentration of toughening agent are relatively small in either case.Nanoindentation tests indicate that it is the local plasticity, brought about by the presence of the softer perfluoroether phase, which is responsible for the enhancement of fracture toughness. This is corroborated by AFM examinations, which reveal local plastic deformations in the regions surrounding the softer particles.     

PBT/官能化聚烯烃弹性体共混体系的力学性能与相形态

考察了马来酸酐接枝乙烯-辛烯共聚物（POE-g-MAH）和乙烯-丙烯酸甲酯-甲基丙烯酸缩水甘油酯三元共聚物（E-MA-GMA）对聚对苯二甲酸丁二醇酯（PBT）的增韧作用。结果表明，未接枝的POE弹性体对PBT缺口冲击韧性的改善作用不大。两种官能化聚烯烃弹性体（E-MA-GMA、POE-g-MAH）对PBT具有显著的增韧作用。当弹性体用量分别达到8．5％和10％以后，共混物都各自出现明显的脆／韧转变现象。这意味着在达到同样的冲击韧性时，PBT／E—MA—GMA共混体系的拉伸强度损失较小。SEM显示，PBT／E—MA—GMA共混体系中分散相具有更细微的分散，有效地诱导PBT基体产生银纹和剪切屈服，消耗大量的冲击能。     

PP/POE/Nano-CaCO3复合材料的动态力学热分析

采用熔融共混工艺制备了聚丙烯(PP)／聚烯烃热塑性弹性体(POE)／纳米CaCO3复合材料。用动态力学试验方法研究了PP／Nano-CaCO3、PP／POE和PE／POE／Nano-CaCO3复合材料的动态力学特征。结果显示：PP／Nano-Ca-CO3PP／POE二元体系的低温内耗峰强度均比PP大；PP／POE／Nano-CaCO3三元复合体系的低温内耗峰强度较之二元体系明显增强，在PE／POE／Nano-CaCO3复合体系中，POE及Nano-CaCO3共同作用使体系tgδ1转变峰逐渐消失，tgδ2峰变宽、增强。利用扫描电子显微镜观察了不同体系的形态，三元复合体系由纯PP的耗能少的空洞化断裂方式逐步向耗能多的基体层屈服方式变化；质量比为100／10／10的PE／POE／Nano-CaCO3复合材料的低温内耗峰强度最大，冲击强度较纯PP提高了178％。