正交设计确定模压条件对HDPE／CB复合材料PTC强度的影响  

Study on the Influence of Compression Molding Parameters on PTC Intensity of HDPE/CB Composites by Statistical Design

作　　者：易回阳[1] 肖建中[2] 

机构地区：[1]湖北师范学院生化分析技术湖北省重点实验室,湖北黄石435002 [2]华中科技大学模具技术国家重点实验室,湖北武汉430074

出　　处：《高分子材料科学与工程》2008年第1期120-123,共4页Polymer Materials Science & Engineering

基　　金：湖北省教育厅重点科研资助项目(D200622004);生化分析技术湖北省重点实验室启动基金资助

摘　　要：在塑炼方法和复合材料组成一定时,用统计学方法,设计了四因子三水平的正交实验以确定不同模压条件对HDPE/CB复合材料PTC强度的影响。结果发现,各设计因素对样品PTC强度的影响大小顺序为:冷却时间>模压温度>模压压力>模压时间。最优模压条件为:模压压力8 MPa,模压温度155℃,模压时间15 min,模压后的冷却时间40 min。在最佳模压成型工艺条件下得到的样品PTC强度为8.4,与统计学的预测结果一致,后NTC强度小于0.8。冷热循环实验结果表明HDPE/CB复合材料有良好的电阻率-温度稳定性。In the conditions of plastication and the content of carbon black, HDPE and other fillers in the composites were ensured, orthogonal experiment of four factors and three levels was designed to make sure the influence of compression molding parameters on PTC intensity of HDPE/CB composite by statistical. The optimum compression molding technical parameters for the largest PTC intensity of HDPE/CB composite should be chosen as characteristic values of cooling time 40 minutes, compression molding temperature 155 ℃, compression molding pressure 8 MPa and compression molding time 15 minutes. The expected PTC intensity calculated by statistical experimental design is successfully confirmed with actual experiment results.The PTC intencity of HDRE/CB composites pressed in the optimum compression molding parameters is 8.40, the NTC intensity is less than 0.8. HDPE/CB composites have excellence volume resistivity-temperature stability passed ninth heat-cooling circulations.

关 键 词：复合材料 PTC强度 正交设计 模压条件 炭黑 

分 类 号：TB33[一般工业技术—材料科学与工程]