供应PMMA/韩国LG化学/HI855H耐冲击高抗冲汽车部件原料详细说明LGChemicalHI855HPMMA,ImpactResistantGrade物性表物理性能额定值(公制)额定值(英制)测试方法比重1.17g/cc1.17g/ccASTMD792吸水率0.40%0.40%24hours;ASTMD570线性成型收缩率0.0040-0.0080cm/cm0.0040-0.0080in/inASTMD955化合物熔体指数3.5g/10min@Load3.80kg,Temperature230°C3.5g/10min@Load8.38lb,Temperature446°FASTMD1238机械性能额定值(公制)额定值(英制)测试方法洛氏硬度（M级）4242ASTMD785抗张强度(断裂)39.0MPa5660psiASTMD638伸长率(断裂)90%90%ASTMD638弯曲强度69.0MPa10000psiASTMD790弯曲模量1.824GPa264.6ksiASTMD790悬壁梁缺口冲击强度0.491J/cm0.920ft-lb/inASTMD256电气性能额定值(公制)额定值(英制)测试方法体积电阻率>=1.00e+15ohm-cm>=1.00e+15ohm-cmASTMD257介电常数3.5@Frequency60Hz3.5@Frequency60HzASTMD150介电强度15.0kV/mm381kV/in4kV/s;ASTMD149耗散因数0.040@Frequency60Hz0.040@Frequency60HzASTMD150热性能额定值(公制)额定值(英制)测试方法线性热膨胀系数60.0µm/m-°C@Temperature20.0°C33.3µin/in-°F@Temperature68.0°FASTMD696载荷下热变形温度(1.8MPa)81.0°C178°F