the tricyclic PS results in an 8-shaped PS with thiol groups which on oxidation leads to a high molecular weight polyring. The topology transformation between the polymers occurs via reversible redox reaction of disulfide/thiol. The high molecular weight of the polyring is realized due to the formation of flexible S–S linkage between the 8-shaped PSs. Their structures are confirmed by FT-IR, 1H NMR,
通过将四臂星形PS的原子转移自由基聚合与叠氮化物-炔烃点击反应相结合而制备的三环聚苯乙烯(PS)合成了可逆生长和解离的多环。在制备三环PS时,在点击环化反应中使用含有二硫键的偶联剂。三环PS中二硫键的还原导致带有硫醇基团的8形PS在氧化时导致高分子量的聚环。聚合物之间的拓扑转变是通过二硫键/硫醇的可逆氧化还原反应发生的。聚环的高分子量是由于8形PS之间形成了柔性的S–S键而实现的。其结构已通过FT-IR确认11 H NMR,SEC和MALDI-TOF MS分析。另外,已经通过SEC分析确认了根据聚合物浓度对多环的分子量进行控制。
The present invention relates to polymer compounds that have antiviral activity. The compounds have the structural Formula I defined herein. The present invention also relates to processes for the preparation of these compounds, to compositions comprising them, and to their use in the prevention or treatment of viral infections.
A composition includes an isomerized polymer containing a structural unit containing an isomerized structure and an isomerized low molecular weight compound, the composition being fluidized by light irradiation from a solid state and being reversibly non-fluidized.
POLYFUNCTIONAL COMPOUNDS AND USES AS IMPLANT MATERIALS
申请人:Xie Dong
公开号:US20090131551A1
公开(公告)日:2009-05-21
The synthesis and characterization of polymer core initiators are described herein. Polymer core initiators are used to prepare the polyfunctional prepolymers described herein, which may be optionally tethered. The polyfunctional prepolymers described herein are used to prepare cements, optionally with added co-monomers, for repairing and restoring tissues.