The application of selective ozonolysis together with high-resolution g.p.c, was performed to determine the crystalline stem lengths, in monomer units, of chain-folded lamellar crystals for trans and cis polyisoprene and polybutadiene. The trans polymer crystals were crystallized at -20°C in hexane directly from the dissolution temperature of 60°C, while the cis polymer crystals were crystallized by the same method at -70°C. The stem lengths of the trans- and cis-l,4-polyisoprene crystals were found to be 11 and 10 monomer units, respectively. Those for trans- and cis-l,4-polybutadiene crystals were found to be 12 and 13 monomer units, respectively
Посилання на статтю:
Direct determination of stem length for chain-folded lamellar polymer crystals grown from solution: ozonolysis-g.p.c, measurements / Yasuyuki Tanaka, Ploenpit Boochathum*, Mikio Shimizu and Katsurni Mita // Polymer. – 1993. – Vol 34. – P. 1098-1101.