Abstract
Syndiotactic polypropene was synthesized using a metallocene catalyst system and traces of VC. The use of VC was found to decrease the molar mass M̄w of the samples distinctly and linearly, while retaining the molar mass distribution, the crystallinity, and the syndiotacticity. The VC, however, initiates the formation of longchain branches, which were detected by GPCMALLS and rheology. Besides their effect on the viscosity and modulus functions, a thermorheologic complexity can be observed. Also the flow activation energy Ea was found to be increased. The modified samples did not obey the η0/M̄w relation for linear sPP, indicating the presence of LCBs.
| Original language | English |
|---|---|
| Pages (from-to) | 1472-1481 |
| Number of pages | 10 |
| Journal | Macromolecular Chemistry and Physics |
| Volume | 211 |
| Issue number | 13 |
| DOIs | |
| State | Published - 1 Jul 2010 |
| Externally published | Yes |
Keywords
- GPC-MALLS
- Long-chain branches
- Metallocene catalysts
- Rheology
- Syndiotactic polypropene
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry
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