简介：Adetailedstudywasperformedonthecrystalstructuresofpan-milledhigh-densitypolyethylene(HDPE)usingdifferentialscanningcalorimetry(DSC)andX-raydiffraction.ThecrystallinityofHDPEfirstdecreasedslightly,followedbyagradualincreasewithincreasingmillingtimes.Monocliniccrystalsappearedafter4cyclesofmilling.Withincreasingtimesofmilling,theproportionofmonocliniccrystalsincreasedsignificantlywhiletheproportionoforthorhombiccrystalsdecreasedgradually.Withincreasingtimesofmilling,thecrystallitesizeoforthorhombicformdecreasedgreatly,whilethesizeofmonocliniccrystalliteskeptalmostconstantduringmilling.
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