© Effect Of Short Chain Branching Of LDPE On Its Miscibility With Linear HDPE Hameed, T; Hussein, IA WILEY-V C H VERLAG GMBH, MACROMOLECULAR MATERIALS AND ENGINEERING; pp: ; Vol: 289 King Fahd University of Petroleum & Minerals Summary The influences of short chain branching (SBC) on the melt miscibility of low-density polyethylene (LDPE) with linear high-density polyethylene (HDPE) were investigated by rheological methods. Two LDPE resins with different branch contents were blended with the same linear HDPE. Dynamic and steady shear measurements were carried out using a Rheometrics ARES rheometer at 190degreesC. The rheology of the low-SCB LDPE (9 CH3/1 000 C) blends with HDPE can be predicted by the linear additivity rule. Hence, blends wee suggested to be completely miscible at all compositions. However, blends of the high branch content LDPE (SCB = 19 CH3/1 000 C) were completely immiscible. Also, the different viscous and elastic properties of all the immiscible blends were much higher than the corresponding values for the more viscous and elastic blend component. The ratio of interfacial tension to droplet radius was estimated from Scholz et al. model as approximate to1 500 N. m(-2). The level of SCB in LDPE was found to have a strong influence on its miscibility with linear HDPE. References: AGAMALIAN M, 1999, MACROMOLECULES, V32, P3093 ALAMO RG, 1994, MACROMOLECULES, V27, P2864 BARHAM PJ, 1988, J MATER SCI LETT, V7, P1271 BRAHIMI B, 1991, J RHEOL, V35, P1069 CHAUNG CI, 1984, J APPL POLYM SCI, V29, P2205 CHO K, 1989, POLYM ENG SCI, V29, P1969 Copyright: King Fahd University of Petroleum & Minerals;

© CHOI P, 2000, POLYMER, V41, P8741 CURTO D, 1983, RHEOL ACTA, V22, P197 DOBRESCU V, 1980, RHEOLOGY, V2 FAN ZGJ, 2002, POLYMER, V43, P1497 FUJIYAMA M, 1991, J APPL POLYM SCI, V42, P481 GARCIAREJON A, 1987, POLYM ENG SCI, V27, P640 GRAEBLING D, 1993, MACROMOLECULES, V26, P320 GRAMESPACHER H, 1992, J RHEOL, V36, P1127 HAMEED T, 2002, POLYMER, V43, P6911 HANSEN EW, 1997, POLYMER, V38, P4295 HILL MJ, 1992, POLYMER, V33, P2530 HILL MJ, 1992, POLYMER, V33, P4099 HILL MJ, 1994, POLYMER, V35, P1991 HILL MJ, 1997, J APPL POLYM SCI, V65, P1921 HUSSEIN IA, 2000, POLYM DEGRAD STABIL, V68, P381 HUSSEIN IA, 2001, POLYM ENG SCI, V41, P696 HUSSEIN IA, 2003, MACROMOLECULES, V36, P2024, DOI /ma HUSSEIN IA, 2003, MACROMOLECULES, V36, P4667, DOI /ma HUSSEIN IA, 2003, POLYMER, V44, P4665, DOI /S (03) LARSON RG, 1992, RHEOL ACTA, V31, P LEE HS, 2000, POLYM ENG SCI, V40, P LIU CY, 2002, POLYMER, V43, P MARTINEZSALAZAR J, 1991, POLYMER, V32, P MINALE M, 1997, MACROMOLECULES, V30, P MUNOZESCALONA A, 1997, POLYMER, V38, P NESARIKAR AR, 1995, MACROMOLECULES, V28, P PLANS J, 1991, POLYMER, V32, P SCHOLZ P, 1989, J RHEOL, V33, P SHARKH BFA, 2002, POLYMER, V43, P TANEM BS, 2001, POLYMER, V42, P TANEM BS, 2001, POLYMER, V42, P UTACKI LA, 1988, POLYM ENG SCI, V28, P UTRACKI LA, 1989, POLYM ALLOYS BLENDS 40. UTRACKI LA, 1991, 2 PHASE POLYM SYSTEM 41. XU JT, 2001, POLYMER, V42, P3867 For pre-prints please write to: Copyright: King Fahd University of Petroleum & Minerals;