The linear steady-state shear compliances J e 0 of two linear short-chain branched metallocenecatalyzed polyethylenes (mLLDPE), two long-chain branched metallocene-catalyzed polyethylenes (LCBmLLDPE), and two classical low density polyethylenes (LDPE) were determined in creep-recovery tests in shear between 130 and 190°C. In order to investigate the dependence of J e 0 on the molecular structure the polyethylenes were characterized by high-temperature size-exclusion chromatography coupled with a multiangle laser light scattering device (SEC-MALLS). For the linear mLLDPE the lowest J e 0 independent of temperature were observed. For the LCB-mLLDPE having similar polydispersities as the linear mLLDPE not only an increase of J e 0 by about 1 order of magnitude compared to the linear mLLDPE but also a significant decrease in J e 0 with increasing temperature was found. For the LDPE possessing long-chain branches as well as higher polydispersities, the highest J e 0 values were detected, which were also temperature dependent. For the LDPE, the decrease of J e 0 with increasing temperature is less pronounced than for the LCB-mLLDPE. However, for both material types the temperature dependence of J e 0 is much stronger than expected from the rubber elastic theory.
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