PCHN-1064I---ThecreepresistanceofPCisbetterthanthatofnylonandPOM.Thisisanimportantsignofitsgooddimensionalstability.Stresscracking:(PCproductsarepronetostresscracking)theinternalstressofplasticsismainlycausedbytheinteractionbetweenmacromolecularchainsforcedtoorientation.ResidualstressandstresscrackingofPCproductsareprominentproblems.WhentheflexuralstrengthofPCisflexedandplacedforacertaintime,themicrotearingwilloccurwhentheflexuralstressexceedsitslimitvalue.WhenthemolecularweightofPCismorethan24000,thestressis35MPa,andwhenthemolecularweightis22000,itisabout20MPa.Hn-1064iphysicalpropertytableTestmethodofphysicalperformanceratingunitSpecificgravity:1.20g/cmASTMD792Meltflowrate(250℃/10.0kg)20g/10minASTMd1238Rockwellhardness(rscale)120ASTMd785Mechanicalproperties-ratingunits-TestmethodsTensilestrength:58.6MPaASTMD638Bendingmodulus2070MPaASTMD790Bendingstrength:84.1MPaASTMD790Impactstrengthofnotchedbeam(d2683.56m)ThermalperformanceratingunittestmethodHotdeformationtemperature(1.8MPa,UNannealed)131℃ASTMD648Vicatsofteningtemperature144℃ISO306/bFlammabilityratingunittestmethodULflameretardantgrade(0.750mm)V-2UL94UL94(1.50mm)V-0(3.00mm)V-0)