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Can I read Studies on polymers from cyclic dienes. XII. Cationic polymerization of spiro[2,4]hepta‐4,6‐diene on EtoBox?
Studies on polymers from cyclic dienes. XII. Cationic polymerization of spiro[2,4]hepta‐4,6‐diene by Osamu Ohara; Chuji Aso; Toyoki Kunitake is a Materials Science article available to read on EtoBox.
What is Studies on polymers from cyclic dienes. XII. Cationic polymerization of spiro[2,4]hepta‐4,6‐diene about?
## Abstract Polymerizations of spiro[2,4]hepta‐4,6‐diene were carried out with cationic initiators and Ziegler‐type catalysts. This monomer polymerized very rapidly with a variety of cationic initiators, and low monomer and initiator concentrations had to be employed in order to avoid formation of crosslinked polymers. The polymer contained 1,2 and 1,4 addition units, and there was no indication of the opening of the cyclopropyl ring in the monomer unit. The following relationship was obtained: [η] = 4.5 × 10^−8^__M̄__~__n__~^1.71^. The exponential coefficient of this equation is much greater than those typical of vinyl polymers, suggesting that the polymer chain is very stiff. The polymer showed much enhanced resistance to autoxidation as compared with polycyclopentadiene, and its softening point was above 200°C. These interesting physical and chemical properties of the monomer and the polymer can be associated with their spiro structures.
Who reads Studies on polymers from cyclic dienes. XII. Cationic polymerization of spiro[2,4]hepta‐4,6‐diene?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Osamu Ohara; Chuji Aso; Toyoki Kunitake
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); Wiley (ISSN 0360-6376)
- Published
- 1973
- Language
- EN
- Field
- Materials Science (Physical Sciences)