TY - GEN
T1 - Crystallization kinetics of polyethylenes
T2 - A perspective from polymerization catalyst
AU - Atiqullah, Muhammad
AU - Fazal, Atif
AU - Al-Harbi, Abdurrahman
AU - Hussain, Ikram
AU - Hossaen, Anwar
PY - 2010
Y1 - 2010
N2 - The isothermal crystallization of three ethylene homopolymers made using a laboratory-scale reactor under comparable polymerization conditions was studied to minimize the effects of varying hydrodynamics on polymer morphology. The surface chemistry and solid-state electronic environment of the catalysts significantly affected M, PDI, and linearity of the synthesized polymers. The residual catalyst could provide temperature-resistant heterogeneous nuclei, and interact on a molecular level to affect primary crystallization can be determined by calculating the concerned activation energy, bulk crystallization rate,a nd the Avrami rate constant. The surface chemistry and solid-state electronic environment of the residual catalysts influenced the dependence of Avrami rate constant on crystallization temperature, bulk crystallization rate, and % crystallinity, especially for the Z-N HomoPE. This is an abstract of a paper presented at the 20th Annual Saudi-Japan Symposium on Catalysts in Petroleum Refining and Petrochemicals (Dharan, Saudi Arabia 12/5-6/2010).
AB - The isothermal crystallization of three ethylene homopolymers made using a laboratory-scale reactor under comparable polymerization conditions was studied to minimize the effects of varying hydrodynamics on polymer morphology. The surface chemistry and solid-state electronic environment of the catalysts significantly affected M, PDI, and linearity of the synthesized polymers. The residual catalyst could provide temperature-resistant heterogeneous nuclei, and interact on a molecular level to affect primary crystallization can be determined by calculating the concerned activation energy, bulk crystallization rate,a nd the Avrami rate constant. The surface chemistry and solid-state electronic environment of the residual catalysts influenced the dependence of Avrami rate constant on crystallization temperature, bulk crystallization rate, and % crystallinity, especially for the Z-N HomoPE. This is an abstract of a paper presented at the 20th Annual Saudi-Japan Symposium on Catalysts in Petroleum Refining and Petrochemicals (Dharan, Saudi Arabia 12/5-6/2010).
UR - https://www.scopus.com/pages/publications/79959601238
M3 - Conference contribution
AN - SCOPUS:79959601238
SN - 9781617826511
T3 - King Fahd University of Petroleum and Minerals, Research Institute - Annual Catalysts in Petroleum Refining and Petrochemicals Symposium Papers
SP - 151
EP - 153
BT - King Fahd University of Petroleum and Minerals, Research Institute - 20th Annual Saudi-Japan Symposium on Catalysts in Petroleum Refining and Petrochemicals 2010
ER -