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Paper Information

Journal:   IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)   DECEMBER 2007-JANUARY 2008 , Volume 20 , Number 5 (ISSUE NO. 89); Page(s) 417 To 428.
 
Paper: 

STUDY ON THE EFFECTS OF TEMPERATURE, TIME AND THE POLICY OF PREPOLYMERIZATION ON PARTICLE MORPHOLOGY IN PROPYLENE SLURRY POLYMERIZATION WITH HETEROGENEOUS ZIEGLER-NATTA CATALYSTS

 
 
Author(s):  PIR CHERAGHI GH.R., POUR MAHDIAN S.*, VATANKHAH M.
 
* AMIRKABIR UNIVERSITY OF TECHNOLOGY, TEHRAN, IRAN
 
Abstract: 

The effects of temperature, time and the strategy of prepolymerization were studied on the morphology of polypropylene particles. Propylene polymerization was carried out in slurry phase using 4th generation of Ziegler-Natta Catalyst, cyclohexylmethyl dimethoxysilane as external electron donor, and triethyl aluminum as co-catalyst. Prepolymerizations were carried out based on two strategies: isothermal and non-isothermal conditions. Particle imaging using SEM, bulk density, and particle size distribution was used to analyse the particle morphology. It was found that the variation of initial condition together with the change in the mechanism of particle fracture has a dominant effect on particle morphology. Each combination between the temperature and reaction time causes to have a special effect on the product particle morphology. It has become clear that in isothermal prepolymerization, spherical particles with identical properties were produced. In low temperature experiments particles with porous surface were observed. At increasing temperature, however, the pores disappeared. Non-isothermal prepolymerization produced different morphological types. In all experiments coreshell structures were observed that seemed to be related to the structure of catalysts.

 
Keyword(s): PREPOLYMERIZATION, MORPHOLOGY, POLYPROPYLENE, ZIEGLER-NATTA, SLURRY POLYMERIZATION
 
 
References: 
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Click to Cite.
APA: Copy

PIR CHERAGHI, G., & POUR MAHDIAN, S., & VATANKHAH, M. (2008). STUDY ON THE EFFECTS OF TEMPERATURE, TIME AND THE POLICY OF PREPOLYMERIZATION ON PARTICLE MORPHOLOGY IN PROPYLENE SLURRY POLYMERIZATION WITH HETEROGENEOUS ZIEGLER-NATTA CATALYSTS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 20(5 (ISSUE NO. 89)), 417-428. https://www.sid.ir/en/journal/ViewPaper.aspx?id=102222



Vancouver: Copy

PIR CHERAGHI GH.R., POUR MAHDIAN S., VATANKHAH M.. STUDY ON THE EFFECTS OF TEMPERATURE, TIME AND THE POLICY OF PREPOLYMERIZATION ON PARTICLE MORPHOLOGY IN PROPYLENE SLURRY POLYMERIZATION WITH HETEROGENEOUS ZIEGLER-NATTA CATALYSTS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN). 2008 [cited 2021May08];20(5 (ISSUE NO. 89)):417-428. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=102222



IEEE: Copy

PIR CHERAGHI, G., POUR MAHDIAN, S., VATANKHAH, M., 2008. STUDY ON THE EFFECTS OF TEMPERATURE, TIME AND THE POLICY OF PREPOLYMERIZATION ON PARTICLE MORPHOLOGY IN PROPYLENE SLURRY POLYMERIZATION WITH HETEROGENEOUS ZIEGLER-NATTA CATALYSTS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), [online] 20(5 (ISSUE NO. 89)), pp.417-428. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=102222.



 
 
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