ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The thermal crosslinking and loss of vinyl unsaturation of syndiotactic 1, 2-polybutadiene(s-PB) at 180-230°C were prevented by stabilizers with 3, 5-di-t-butyl-4-hydroxybenzyloxy group. The s-PB samples (mp 140-198°C and MW 20,000-70,000) that contained the stabilizers could be melt-spun at a temperature below 220°C into 1-denier fibers to be used for the preparation of carbon fibers. The s-PB fibers with higher mp and/or higher MW could be obtained by the addition of a high boiling solvent such as tetralin. The relationship between the molecular structures of s-PB and the properties of resulting s-PB fibers, including the degree of molecular orientation measured by birefringence and x-ray diffraction, is presented. Spun fibers showed small swellings here and there along the fiber axis, which would have resulted from the inhomogeneity of the melt of s-PB spun at a temperature slightly above the melting point. The gelation was unlikely to occur.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1983.170210418
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