Non-Isocyanate Aliphatic-Aromatic Poly(carbonate-urethane)s-An Insight into Transurethanization Reactions and Structure-Property Relationships.

ABSTRACT: This study reveals insights into the transurethanization reactions leading to the aliphatic-aromatic non-isocyanate poly(carbonate-urethane)s (NIPCUs) and their structure-property relationships. The crucial impact of the alkyl chain length in 4,4'-diphenylmethylene bis(hydroxyalkyl carbamate) (BHAC) on the process of transurethanization reactions was proved. The strong susceptibility of hydroxyethyl- and hydroxybutyl carbamate moieties to the back-biting side reactions was observed due to the formation of thermodynamically stable cyclic products and urea bonds in the BHACs and NIPCUs. When longer alkyl chains (hydroxypentyl-, hydroxyhexyl-, or hydroxydecyl carbamate) were introduced into the BHAC structure, it was not prone to the back-biting side reaction. Both ¹H and ^13</

SUBMITTER: Wolosz D 

PROVIDER: S-EPMC9570502 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature