Polymerization of propylene in a minireactor: Effect of polymerization conditions on particle morphology
Publish place: Polyolefins Journal، Vol: 5، Issue: 2
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
View: 374
This Paper With 13 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_POJ-5-2_002
تاریخ نمایه سازی: 23 آبان 1397
Abstract:
Gas phase polymerization of propylene was carried out in a semi-batch minireactor using a commercially supported Ziegler–Natta (ZN) catalyst. The influence of variables including monomer partial pressure, external electron donor, reaction temperature and time on the particle morphology and size distribution was investigated. Generally, more uniform fragmentation and particle densities were obtained at lower reaction rates. Monomer partial pressure showed a significant role of particle size and its distribution, the higher the monomer partial pressure, the broader particle size distribution was obtained. Polymerization pressure had a significant role on the morphology of particles. Wider cracks and more porosity were resulted from the polymerizations at higher pressures. Furthermore, a broader particle size distribution was obtained from the polymerization at higher pressures. The particle size analysis revealed the monomer partial pressure as the most effective parameter on the distribution of particles. The SEM images showed that three different steps could be distinguished in the development of particle morphology within the particle, showing the initiation and development of cracks and appearance of fragments inside the particle. Polyolefins J (2018) 5: 111-123
Keywords:
Authors
Mehrsa Emami
Iran Polymer and Petrochemical Institute, P.O.Box ۱۴۱۸۵/۴۵۸, Tehran, Iran
Mahmoud Parvazinia
Iran Polymer and Petrochemical Institute, P.O.Box ۱۴۱۸۵/۴۵۸, Tehran, Iran
Hossein Abedini
Iran Polymer and Petrochemical Institute, P.O.Box ۱۴۱۸۵/۴۵۸, Tehran, Iran