The structure of the α and β polymorphs of isotactic 1,4-cis-poly(2-methyl-1,3-pentadiene)
✍ Scribed by Ferro, D. R.; Bruckner, S.; Meille, S. V.; Ragazzi, M.
- Book ID
- 126301089
- Publisher
- American Chemical Society
- Year
- 1991
- Tongue
- English
- Weight
- 468 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0024-9297
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## Abstract **Summary:** A comparison between the crystal structure of isotactic __cis__‐1,4‐poly(1,3‐pentadiene) previously predicted by molecular mechanics calculations and that successively determined by other authors by experimental data is reported. The agreement between the two structures is
## 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 (≥80%). NMR examination has shown that the polymers have an isotactic structure. This conclusion wa
## Abstract 4‐Methyl‐1,3‐pentadiene was polymerized with the MAO/CpTiCl~3~ (MAO: methyl‐aluminoxane, Cp: Cyclopentadienyl) system to yield a highly stereoregular syndiotactic 1,2‐polymer. Fiber diffraction patterns indicate two crystalline modifications: a major one with a repeat of 11.73 Å and min