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Synthesis of high molecular weight poly (β-pinene).

Authors :
Keszler, B.
Kennedy, J. P.
Chujo, Y.
Saegusa, T.
Halperin, A.
Tirrell, M.
Lodge, T. P.
Nguyen, T. Q.
Kausch, H. -H.
Corradini, P.
Guerra, G.
Armitstead, K.
Goldbeck-Wood, G.
Fischer, M.
Stamm, M.
Abe, AKihiro
Benoit, Henri
Cantow, Hans-Joachim
Corradini, Paolo
Dušek, Karel
Source :
Macromolecules: Synthesis, Order & Advanced Properties; 1992, p1-9, 9p
Publication Year :
1992

Abstract

In the course of attempts to develop conditions for the living polymerization of β-pinene (β-PIN) we discovered that the conventional “H2O”/EtAlCl2 system produces poly(β-PIN)s of heretofore unattained high molecular weights (at least up to ∼40,000) and that the molecular weight can be controlled by the polymerization temperature in the −23 to −100°C range. The log $$\bar M•n$$ versus 1/T plot is linear and yields ΔHDP=−0.83 kcal/mol. The repeat unit of the high molecular weight polymer is which reflects isomerization polymerization. The Tg of poly(β-PIN) is 65°C by DSC. Melt drawn fibers are amorphous by X-ray analysis. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISBNs :
9783540544906
Database :
Supplemental Index
Journal :
Macromolecules: Synthesis, Order & Advanced Properties
Publication Type :
Book
Accession number :
32688583
Full Text :
https://doi.org/10.1007/BFb0051633