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- W1983103438 abstract "The effects of branch content (BC) and copolymer composition distribution (CCD) on the non-isothermal crystallization kinetics of metallocene m-LLDPEs were studied using modified Avrami analysis, modulated differential scanning calorimetry (MDSC), and Crystaf. Several m-LLDPEs and an m-HDPE – all having comparable Mw and PDI – were experimented. In addition, a ZN-LLDPE was used for comparison purposes. The branch content, unlike the used cooling rates (2–6 °C/min), significantly affected the crystallization behavior. Crystallization peak temperature, Tcpeak, decreased linearly with increasing BC. All the m-LLDPEs showed primary and secondary crystallizations. The secondary crystallization showed to be more pronounced at high BC. The primary crystallization Avrami parameter n for m-HDPE ranged between 3.72 and 4.50, indicating spherulitic crystal growth whereas that for the m-LLDPEs, varied from 2.02 to 5.70. The ZN-LLDPE (having broader composition distribution) offered higher values of Tconset and Tcpeak than the m-LLDPEs with similar BC, Mw, and PDI. It, unlike the m-LLDPEs and m-HDPE, fairly agreed with the crystallization kinetic model proposed by Liu et al. The lamella thickness of the m-LLDPEs, L, calculated as per Gibbs–Thomson equation, showed to be in the range 2–16 nm, depending on BC and it decreased approximately following the relationship: L (nm) = 15.0 e(−0.0498BC)." @default.
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- W1983103438 date "2007-02-01" @default.
- W1983103438 modified "2023-10-16" @default.
- W1983103438 title "Effects of branching characteristics and copolymer composition distribution on non-isothermal crystallization kinetics of metallocene LLDPEs" @default.
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- W1983103438 doi "https://doi.org/10.1016/j.eurpolymj.2006.10.019" @default.
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