ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
A series of polymers have been prepared that contain ethyl, n-propyl, n-butyl, n-pentyl, and n-hexyl branches. We have determined the rocking vibrations of the branches and have shown that branches in solid polymers have their rocking vibrations at frequencies comparable with those shown by liquid hydrocarbons. The ethyl branches in seven different polymers have infrared absorption bands in the 785-760 cm. -1 (12.74-13.18 μ) region. The terminal n-propyl group absorbs at 740 cm.-1 (13.51 μ) and the n-propyl branch at 735 cm.-1 (13.61 μ). The n-butyl, n-pentyl, and n-hexyl branches in polymers have their infrared absorption at 724 cm.-1 (13.81 μ), 723 cm.-1 (13.83 μ) and 722 cm.-1 (13.85 μ), respectively. The above data have been used to identify ethyl, n-propyl, and n-butyl branches in polymers produced by the cationic polymerization of propylene and l-butene.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1961.070051501
Permalink