15573-40-7Relevant articles and documents
RECYCLABLE POLYMERS BASED ON RING-FUSED GAMMA-BUTYROLACTONES
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Page/Page column 34; 44; 48, (2020/02/23)
The invention discloses a class of new polymers, trans-ring-fused poly(4-hydroxybutyrate)s (RF-P4HB) that exhibit a unique set of properties, including robust thermal stability and mechanical strength, quantitative recyclability to the building block monomers via thermolysis and/or chemical catalysis, and convenient production from the chemical ring-opening polymerization under ambient temperature and pressure. Another unique property is the formation of crystalline stereocomplexed polymers with high melting temperature upon mixing the two enantiomeric RF-P4HB chains via stereocomplexing co-crystallization. This invention also provides the corresponding ring-fused lactone monomer structures that enable the synthesis of the RF-P4HB polymers, through trans-fusing of rings to the parent γ-butyrolactone ring. Furthermore, a polymerization or copolymerization process for the synthesis of RF-P4HB polymers and copolymers is disclosed.
Preparations and Crystal Structures of the 2-Oxides of Some Octahydro-3,2,1-benzoxathiazines and Octahydro-2H-3,1,2-benzoxazaphosphorines
Goodridge, Richard J.,Hambley, Trevor W.,Ridley, Damon D.
, p. 591 - 604 (2007/10/02)
The cis- and trans-fused 1-benzyl-1,4,4a,5,6,7,8,8a-octahydro-3,2,1-benzoxathiazine 2-oxides and cis- and trans-fused 1-benzyl-2-phenyl-1,4,4a,5,6,7,8,8a-octahydro-2H-3,1,2-benzoxazaphosphorine 2-oxides have been prepared from the cis- and trans-2-benzylaminocyclohexanemethanols and their structures have been determined by n.m.r. and crystallographic methods.
