Polyoxetane
Polyoxetane (POX), or poly(oxetane), is synthetic organic heteroatomic thermoplastic polymer with molecular formula (–OCH2CH2CH2–)n. It is polymerized from oxetane monomer, which is a four-membered cyclic ether. History Needed chemistry was observed and developed through the 1930s and 1940s. The very first polymerized oxetane was 3,3-Bis(chloromethyl)oxetane, 3,3-bis(chloromethyl)oxetane followed by other 3,3-disubstituted derivatives during the 1950s. Unsubstituted oxetane itself was polymerized in 1956. Monomers Tens of oxetane derivatives have been synthesized and many of them are polymerizable. Reasons for inability to polymerize are different basicity and ring strain caused by different electron and bulkiness of substituents also as their position. Major 3-substituted and 3,3-disubstituted monomers are summarized in the oxetane article. Polymerization Mechanism Ring strain of unsubstituted oxetane is 107 kJ/mol. That is twenty times more, than non-polymerizabl ...
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