聚苯醚聚丁二烯共混改性及其复合材料研究.doc

聚苯醚/聚丁二烯共混改性及其复合材料研究黄璀 王海宾 程树军 王耀先 *华东理工大学 材料科学与工程学院 上海 200237聚苯醚（PPO）是一种性能优异的工程塑料，具有优良的电性能、热性能、耐沸水、耐辐射和良好的尺寸稳定性、阻燃性，以及与铜箔具有优良的粘接性能等特点 ，在高性能PCB 中有着广泛的应用 [1]但它是一种热塑性树脂，存在耐锡焊性差、耐卤代烃和芳香烃等溶剂性差、成膜性差等缺陷因此，采用聚丁二烯(PB)改性 PPO，能形成交联固化的热固性树脂，能提高其耐锡焊性、耐溶剂性及介电性能PPO 与 PB 共混可通过降低聚合物的分子量和加入相容剂改善两者的相容性 [2]Fig.1和 Fig.2 是 PPO/PB1:1（质量比）共混时加入相容剂前后的 SEM 照片从 Fig.1 中可以看出两者共混的微观结构呈块状或球状，而且颗粒较大，这是因为 PPO 与 PB 的分子之间的结构差别很大，它们之间的相容性较差，相分离严重Fig.2 是加入相容剂后的 SEM 照片，从图中看出两者的微观结构发生了明显的变化，原来的块状或球状消失了，共混物变得比较均匀，这说明加入相容剂后明显地提高了聚苯醚和聚丁二烯的相容性。

Fig.1 SEM photo for none compatibilizer Fig.2 SEM photo for compatibilizer account for 15%对制备出的复合材料进行的 DMA 分析如 Fig.3 所示，内耗(tanδ)-温度曲线分别在195℃和 220℃出现了两个部分重叠的玻璃化转变峰，这表明 PPO 和 PB 两者是部分相容按照内耗峰确定的玻璃化转变温度，说明该复合材料的热性能良好，在高温下性能比较稳定Fig.4 是复合材料介电性能与频率的关系图当频率为 1MHz 时，介电常数为 2.25，介电损耗为 2.29×10－3 ，可以看出制得的复合材料具有优异的介电性能采用 PPO/PB 共混改性制备的复合材料具有优良的力学性能(拉伸强度为 249MPa，拉伸模量为 9.07GPa，巴氏硬度为 50)，低吸水率(0.19%)和良好的成型工艺性通讯联系人：王耀先，E-mail: wyxian@ Fig.3 The DMA curve of PPO/Pb/glass fiber cloth composites Fig.4 The dielectric properties of PPO/PB/glass fiber cloth composites参考文献[1] SJ WU,TK LIN,SS SHYU. Cure Behavior, Morphology, and Mechanical Properties of the Melt Blends of Epoxy with Polyphenylene Oxide. Journal of Applied Polymer Science, 2000, 75(1): 26.[2] Xiaodong Wang, Wei Feng, Huangquan Li, Eli Ruckenstein. Optimum toughening via a bicontinuous blending: toughening of PPO with SEBS and SEBS-g-maleic anhydride. Polymer, 2002, 43: 37.The Modification of Polyphenylene oxide/ Polybutadiene and the Research of the Related CompositesHuang Cui, Wang Haibing, Cheng Shujun, Wang YaoxianSchool of Materials Science and Engineering, East China University of Science and Technology，Shanghai 200237Abstract: In this paper, the miscibility of polyphenylene oxide (PPO) and PB was studied by DMA and SEM. The solvent and compatibilizer of blending system was determined, and the prepreg that have a stable process property and high-performance laminate were prepared by using glass fiber as reinforcement, the blends of PPO and PB resin as matrix. The results indicate that the composites which was prepared by the blends of PPO and PB have excellent performance, such as low dielectric constant , good mechanical properties, low water absorption and excellent heat resistance.Keywords: Polyphenylene oxide, Polybutadiene, laminate , blend, miscibility。