Thermorheological properties of LLDPE/LDPE blends

ORIGINAL CONTRIBUTIONT hermorheological properties of LLDPE/LDPE blendsO. Delgadillo-Vel zquez&S. G. Hatzikiriakos&M. SentmanatReceived: 9 November 2006 /Accepted: 2 April 2007 / Published online: 7 May 2007#Springer-Verlag 2007 AbstractThe Thermorheological behavior of a number oflinear low-density polyethylene and low-density polyethyl-ene ( LLDPE/LDPE ) blends was studied with emphasis onthe effects of long chain branching. A Ziegler Natta, lldpe ( ) was blended with four LDPEs having distinctlydifferent molecular weights. The weight fractions of theLDPEs used in the blends were 1, 5, 10, 20, 50, and 75%.Differential scanning calorimetry (DSC) analysis has shownthat all blends exhibited more than one crystal type. At highLDPE weight fractions, apart from the two distinct peaks ofthe individual components, a third peak appears whichindicates the existence of a third phase that is created fromthe co-crystallization of the two components.

LDPE blends were immiscible in the melt state, with LCB being the determining factor of their immiscibility behavior. Recently, Wagner et al. (2004) performed a quantitative

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  Properties, Thermorheological properties of lldpe ldpe, Thermorheological, Lldpe, Ldpe

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