摘要
Thecrystallinityofethylene-butenecopolymerspreparedbycopolymerizationofethyleneandbuteneinthepresenceofanewhighlyactivecatalystwasstudiedbymeansofDSC,WAXDandDMA.Theresultsshowthatthemeltingtemperature,thecrystallinityandthecrystallitesizedecreasedwithincreasingthecontentofbuteneinthecopolymers.Thecopolymershaveahighdegreeofbranching,thebutenesegmentsaremainlyintheamorphousregionsofthecopolymers,whilethepolyethylenesequenceformscrystalphaseactingascrosslinkingbondagebetweenthemoleculesatroomtemperature.Theethylene-butenecopolymershavealowmodulus,alowstressandahighstrainanalogoustothestress-strainbehaviorofnon-crossthermoplasticelastomer.
出版日期
2002年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)