Crystallization of controlled rheology type polypropylene
✍ Scribed by Ladislav Pospíšil; František Rybníkař
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 384 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0032-3861
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Controlled-rheology polypropylene melts were prepared via molecular modification of a commercial polypropylene resin. A peroxide-initiated degradation was performed, resulting in materials with different molecular weight distributions. These resins were subjected to rheological characterization, and
The peak broadening in size exclusion chromatography of seven commercial polystyrene (PS) standards with narrow molar mass distribution (MMD) and of 6-9 polypropylene (PP) fractions ( MW/M,, = 1.34-2.10) obtained by direct extraction was determined in four different column sets. The dependence of th