ISSN:
0449-296X
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A detailed investigation of the terpolymerization reaction of ethylene and propylene with 1-isopropylidene-dicyclopentadiene (II) was carried out by empolying vanadiumbased anionic coordinate catalysts [preferentially V(Acac)3—AlEt2Cl]. The influence of some polymerization parameters, i.e., concentration of II, of the catalyst; polymerization time, etc., were particularly examined. The catalysts were found to be active in C2H4—II copolymerization also, but neither C3H6—II copolymer nor II homopolymer were obtained. By using the 5,6-dihydro derivative of II as comonomer, it was found through ultraviolet, infrared, and NMR analyses that the incorporation of II in polyethylene or ethylene-propylene chains took place randomly and by selective opening of the norbornene double bond. The quantitative determination of the unsaturation present in C2H4—C3H6—II terpolymer was studied by means of absorption of iodine halides and through a spectroscopic ultraviolet method. Reference was made to terpolymer samples containing 14C-labeled II. The content of II was generally less than 35 wt-% both in copolymer and in terpolymer prepared. The relatively high reactivity of II is discussed in terms of norbornene ring strain and compared with the reactivity of 1-isopropylidene-3a,4,7,7a-tetrahydroindene (I) previously reported.
Additional Material:
15 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1971.150090610
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