PC SC-1220R
PCSC-1220R--PChasgoodweatherresistanceandgoodstabilitytoheat,heatradiation,airandozone.Thephysicalandmechanicalpropertiesoftheproductsarealmostunchangedafteroneyearofoutdoorexposure,butthePCwillundergophotooxidationreactionundertheactionofultr***ioletlightnear290nmandgraduallyaging.Photoagingbeginswiththeyellowingofthesurface,andgraduallybreaksthewholemolecularchain,reducesthemolecularweight,andfinallycracks.Antiagingpropertiescanbeimprovedbyaddingultr***ioletabsorbers.PC(selfextinguishingmaterial)canburninfire,butitwillselfextinguishafterle***ingthefiresource.Ifantimonytrioxideflameretardantandphosphateplasticizerareaddedintoit,theflameresistanceofPCcanbeimproved.PurePCiscolorlessandtransparentinappearanceandhasgoodtran***ittance.Itstran***ittanceisrelatedtothew***elengthoflightandthethicknessofproducts.Thetran***ittanceofPCwiththicknessof2mmis90%.Butitcannottran***itshortw***elightbelow290×10-3nmPC的分子极性不大,Tg高,吸水性低,因此具有优良的电绝缘性能,已接近或相当接近向来被认为电绝缘性能优良的PET,PC本身***、无臭、无味,具有一定的抗化学腐蚀能力,对有机酸、稀无机酸、盐类、油、脂肪烃及醇都较稳定,但不耐氯烃、稀碱、***水、浓酸、王水以及***等。虽不会引起明显降解,但较容易使PC溶解的溶剂有:四氯***、二氯***、二氯***、三氯***、三***、***、四氢***等等。PC有一定的吸水性,但不影响尺寸和形状的稳定,它在正常使用情况下的吸水率是0.15%,室温中的吸水率是0.35%,沸水中吸水率为0.58%。它能耐60℃温度的热水,但在更高的水温下就会导致开裂并失去韧性。水蒸气中蒸煮100次以后,其物理力学性能显著下降。.SC-1220R物性表物理性能额定值单位测试方法密度1.20ASTMD792熔体流动速率(300℃,1.2kg)22g/10minASTMD1238吸水率0.20%ASTMD570成型收缩率0.5-0.7%ASTMD955机械性能额定值单位测试方法拉伸屈服强度630kgf/cmASTMD638断裂伸长率90%ASTMD638弯曲强度920kgf/cmASTMD790弯曲模量24000kgf/cmASTMD790悬臂梁缺口冲击强度(1/8)80/cmASTMD256洛氏硬度77MASTMD785热性能额定值单位测试方法热变形温度ASTMD648(0.45Mpa)136℃(1.8Mpa)125℃维卡软化温度149℃ASTMD1525阻燃性V-2UL94)