ISSN:
0887-624X
Keywords:
combined catalyst system
;
polymerization
;
polyphenylacetylene film
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The simultaneous polymerization and formation of polyphenylacetylene film by Nd(P204)3-Fe(AA)3-Al(i-Bu)3 catalyst system have been investigated. The combined catalytic effects between rare earth phosphonates with MT(naph)x or Fe(AA)3 systems are first proposed and compared. The polymerization features and kinetic behaviors with Nd(P204)3-Fe(AA)3-Al(i-Bu)3 system are described and discussed. The combined catalytic effects have the following order, respectively: Fe ≫ Co 〉 Cr 〉 Mn-Ni, Nd(P204)3-Nd(P507)3 〉 Nd(P350)3 and Tb 〉 Sm 〉 Yb 〉 Ho 〉 Lu 〉 Dy 〉 Nd-Er-Pr 〉 Y-Tm 〉 Ce 〉 Gd 〉 La. The overall polymerization activation energy was found to be 20.8 kJ/mol showing coordination-anionic polymerization characteristic. PPA films so obtained are very similar to the rare earth ones. © 1995 John Wiley & Sons, Inc.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pola.1995.080331115
