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Self-Nucleated Crystallization Of A Branched Polypropylene, Dhwaihi Alotaibi
Self-Nucleated Crystallization Of A Branched Polypropylene, Dhwaihi Alotaibi
Masters Theses 1911 - February 2014
Long chain branched polypropylene (LCBPP) crystallizes rapidly and with high nucleation density. The origin of this fast crystallization process is not well understood. It has been attributed to its complicated molecular architecture. In this research, we explore isothermal crystallization of LCBPP, 5%LCBPP and linear polypropylene (LPP) through rheological, thermal, microscopy and optical measurements at different experimental temperatures. The time resolved mechanical spectroscopy technique was used to predict the liquid-to-solid transition (gel point) at different crystallization temperatures (supercooling rates) in order to understand the structure during the crystallization process.
The crystallization process of LCBPP was completed in time scale less …