Fractionation of stereoregular poly-(s)-4-methyl-1-hexene and poly-(r)(s)-4-methyl-1-hexene on the basis of molecular weight

✍ Scribed by P.L. Luisi; F. Pezzana

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 452 KB
• Volume: 6
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(70)90159-x

✦ Synopsis

Samples of poly-(S)-4-methyl-l-hexene and poly-(R)(S)-4-methyl-l-hexene having different stereoregularity have been fractionated on the basis of tool. wt. by fractional precipitation, using benzene as a solvent and nitrobenzene as a non-solvent. Results are discussed in terms of the relationships between tool. wt. and stereoregularity, and differences in tool. wt. distribution between the two polymers are emphasized. In the range investigated, no measurable dependence of optical activity on mol. wt. has been found in the case of poly-(S)-4-methyl-l-hexene.