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Synthesis of Isotactic Poly-1,2-(4-methyl-1,3-pentadiene) by a Homogeneous Titanium Catalyst

✍ Scribed by Proto, Antonio; Capacchione, Carmine; Venditto, Vincenzo; Okuda, Jun


Book ID
125897477
Publisher
American Chemical Society
Year
2003
Tongue
English
Weight
63 KB
Volume
36
Category
Article
ISSN
0024-9297

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## Abstract 3‐Methyl‐1,3‐pentadiene has been polymerized with the Al(C~2~H~5~)~2~Cl/Nd(OCOC~7~H~15~)~3~/Al[CH~2~CH(CH~3~)~2~]~3~ system to crystalline polymers consisting essentially of cis‐1,4 units (β‰₯80%). NMR examination has shown that the polymers have an isotactic structure. This conclusion wa

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Oriented specimens of isotactic cis-l,4-poly(3-methyl-l,3-pentadiene) exhibit two crystalline modifications characterized, respectively, by the expected two-fobd helical conformation with a fiber repeat of 8,02 A and by a three-fold helix with c = 9,97 A. The latter highly contracted structure is pr