Detail of "6931-54-0"

Reference

Radiation-induced cationic polymerization of terpene epoxides

Radiation-induced cationic polymerization of terpene epoxides. Aikins, James A.; Williams, Ffrancon (Dep. Chem., Univ. Tennessee, Knoxville, TN 37996-1600, USA). Polym. Prepr. (Am. Chem. Soc., Div. Polym. Chem.), 25(1), 260-1 (English) 1984. CODEN: ACPPAY. ISSN: 0032-3934. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Radiation-induced cationic polymn. of (+)-limonene oxide [1195-92-2], a-pinene oxide [1686-14-2], and b-pinene oxide [6931-54-0] gave low d.p., which indicated that chain transfer occurred during polymn.

Radiation-induced cationic polymerization of limonene oxide, a-pinene oxide, and b-pinene oxide

Radiation-induced cationic polymerization of limonene oxide, a-pinene oxide, and b-pinene oxide. Aikins, J. A.; Williams, F. (Dep. Chem., Univ. Tennessee, Knoxville, TN, USA). Report, DOE/ER/02968-T1; Order No. DE84015738, 36 pp. Avail. NTIS From: Energy Res. Abstr. 1984, 9(20), Abstr. No. 40755 (English) 1984. DOCUMENT TYPE: Report CA Section: 35 (Chemistry of Synthetic High Polymers) The title monomers (in the form of neat liqs.) undergo radiation-induced polymn. with no apparent side reactions and high conversions to precipitatable polymers of low mol. wt. A cationic mechanism is evidenced by the strongly retarding effect of Pr3N on the polymn. rate. At 25° limonene oxide (I) [1195-92-2] gives the highest polymn. rates, an av. conversion of 36% per Mrad being obtained in comparison with values of 5.7 and 7.3% per Mrad for the a-pinene oxide (II) [1686-14-2] b-pinene oxide (III) [6931-54-0], resp. Similarly, the av. anti DP/sub n/ decreases from 11.8 for the I polymer to 5.6 and 4.0 for the II and III polymers, resp. A high frequency of chain transfer to monomer is indicated in each case by the fact that the kinetic chain lengths are ~100 times larger than the anti DP/sub n/ values. Structural characterization of the I polymer by 1H and 13C NMR spectroscopy show that the polymn. proceeds by the opening of the epoxide ring to yield a 1,2-trans polyether. Similar NMR studies on the polymers formed from the II and III show that the opening of the epoxide ring is generally accompanied by the concomitant ring opening of the cyclobutane ring structure to yield a gem-di-Me group in the main chain. The detection of isopropenyl end groups in the II and III polymers is also consistent with this mode of propagation being followed by chain (proton) transfer to monomer.