Solvent-free olefin metathesis depolymerization of 1,4-polybutadiene

Macromolecules

Volumn 33, Issue 5, 2000, Pages 1494-1496

  Watson, Mark D ^a   Wagener, Kenneth B ^a  

^a University of Florida ^*  (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSTS; CHEMICAL REACTIONS; ELASTOMERS; MOLECULAR STRUCTURE; MOLECULAR WEIGHT; NUCLEAR MAGNETIC RESONANCE; OLEFINS; RUTHENIUM;

INTRAMOLECULAR CHAIN LIMITATION; METATHESIS;

POLYBUTADIENES;

EID: 0033907030     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma991560p     Document Type: Article

References (18)

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4. Polymers were precipitated from toluene into MeOH, then degassed, and azeotropically dried under reduced pressure with sodium-dried toluene. All manipulations were conducted in an argon-purged drybox.
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7. (c) Marmo, J. C. ADMET Depolymerization: The Synthesis of Perfectly Difunctional Telechelics. Ph.D. Disseration, University of Florida, Gainesville, 1994.
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10. Kaminsky, W. In Handbook of Polymer Synthesis, Part A; Kricheldorf, H. R., Ed.; Marcel-Dekker: New York, 1992; pp 389-391.
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14. 3 carbons: Sato, H.; Takebayashi, K.; Tanaka, Y. Macromolecules 1987, 20, 2418.
15. 2 carbons: van der Velden, G.; Didden, C.; Veermans, T.; Beulen, J. Macromolecules 1987, 20, 1252. Polymer PB2 was included in the latter study.
16. Schrock, R. R.; Murdzek, J. S.; Bazan, G. C.; Robbins, J.; DiMare, M.; O'Regan, M. J. Am. Chem. Soc. 1990, 112, 3875.
17. Vrentas, J. S.; Duda, J. L. In Encyclopedia of Polymer Science and Engineering, 2nd ed.; Kroschwitz, J. I., Ed.; Wiley-Interscience: New York, 1985; Vol. 15, pp 36-38. Successful depolymerization with catalyst 4 can be achieved simply by warming the semicrystalline product mixture.
18. Chain limiter was prepared immediately prior to use by metathetical dimerization of ethyl 10-undecenoate. The chain limiter/catalyst residue mixture was added to polymer 2 and depolymerization conducted as above to yield ester-terminated polybutadienes with average molecular weight proportional to the molar ratio of chain limiter to repeat unit. Reaction between polymer 2 and ethylene, catalyzed by 1 in the bulk state, also successfully produces vinyl-terminated oligomers.