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Preparation of polynorbornene with β-diketonate titanium / MAO catalysts.
- Source :
- Polymer Bulletin; Feb2002, Vol. 47 Issue 6, p521-527, 7p
- Publication Year :
- 2002
-
Abstract
- Polynorbornene was synthesized by β -diketonate titanium / MAO (methylaluminoxane) catalysts. The polymerization activity was up to 8 × 10<superscript>3</superscript> g polymer/(mol Ti h). FT-IR, <superscript>1</superscript>H NMR, <superscript>13</superscript>C NMR and WAXD analyses showed that the polynorbornenes contained both ring-opening metathesis (trans and cis) and addition polymer chain structures and they are amorphous. The portions of trans- and cis- double bonds decreased when the polymerization temperature and Al/Ti molar ratio decreased. In addition, using 1,2-dichlorobenzene, instead of toluene, as the polymerization solvent increased the activity and produced the polymer containing more cis-double bonds. The glass transition temperature of the elastic polymers ranged from 330°C ∼ 400°C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01700839
- Volume :
- 47
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Polymer Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 49985375
- Full Text :
- https://doi.org/10.1007/s002890200017