BIOABSORBABLE POLYMERS FROM BIOABSORBABLE POLYISOCYANATES AND USES THEREOF
申请人:Bezwada Rao S.
公开号:US20090292029A1
公开(公告)日:2009-11-26
Novel bioabsorbable and/or biocompatible polyurethanes, polyureas, polyamideurethanes and polyureaurethanes with tunable physical, mechanical properties and hydrolytic degradation profiles are provided for use in biomedical applications such as stents, stent coatings, scaffolds, foams, and films. The disclosed polymers may be derived from biocompatible and/or bioabsorbable polyisocyanates. The present invention also relates to new and improved methods for the preparation of the biocompatible and/or bioabsorbable polyisocyanates.
Synthesis and properties of biodegradable cationic gemini surfactants with diester and flexible spacers
作者:Dongqing Xu、Xiaoyue Ni、Congyu Zhang、Jie Mao、Changchun Song
DOI:10.1016/j.molliq.2017.05.092
日期:2017.8
A series of cationicgeminisurfactants with diester and flexible spacers, namely C12-PG-C12, C14-PG-C14 and C16-PG-C16, were synthesized, purified and characterized. The surface properties and aggregation behavior of the geminisurfactants were investigated by surface tension, electrical conductivity, fluorescence and Krafft point. These geminisurfactants possess higher surface activity than the
PROCESS FOR THE PREPARATION OF CROSSLINKED NITROXIDE POLYMERS
申请人:Nesvadba Peter
公开号:US20100240858A1
公开(公告)日:2010-09-23
The invention relates to a process for the preparation of crosslinked polymers bearing nitroxide groups, which are prepared by a method frequently called atom transfer radical addition polymerization (ATRA). A further aspect of the invention is the use of such polymeric crosslinked nitroxides as stabilizers for polymers against the detrimental influences of heat and UV light, as stabilizers against premature polymerization of vinyl aromatic monomers and as active electrode materials in secondary batteries.