ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The polymerization and properties of the polymers of 2-isopropyl, 2-n-heptyl, 2-n-decyl, and 2-tert-butyl-1,3-butadienes are described. Second-order transition temperatures were obtained for the 2-alkyl-1,3-butadiene polymers. Poly-2-n-heptyl-1,3-butadiene has a transition temperature of -83°, near that of polybutadiene. Polymers of isopropyl, tert-butyl, and n-decylbutadiene have higher transition temperatures than polyisoprene. Branched side-chains raise the second-order transition temperatures markedly. This is especially true of the tert-butylbutadiene polymer (Tm = +20°). Poly-2-n-decylbutadiene has a transition temperature at -53° and is birefringent below -40°. From these results and those of previous workers1b it is apparent that sidechain branching raises the transition temperatures of poly-2-alkyl-1,3-butadienes and that low temperature flexibility cannot be materially improved over that exhibited by polybutadiene by the use of butadiene monomers containing 2-substituted alkyl groups.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1951.120070406
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