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Polymorphism of crystalline polypropylene

✍ Scribed by E.J. Addink Miss; J. Beintema

Book ID
103346458
Publisher
Elsevier Science
Year
1961
Tongue
English
Weight
715 KB
Volume
2
Category
Article
ISSN
0032-3861

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Abstraet~Conformational energy calculations have been performed on two crystalline polymorphic forms of syndiotactic polypropylene. A chain conformation having the helicoidal s(2/1)2 symmetry has been obtained for the form of the polymer having chain axis c = 7.40 A.. A chain conformation having the

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## Abstract A number of commercial and experimental samples of crystalline polypropylene were fractionated by sand column solvent gradient elution techniques. Two different solventβ€”nonsolvent systems were studied under several sets of experimental conditions. Deposition of polymer upon the sand fro