Expression mechanism of biocompatibility of polymer materials based on the state-change behavior of incorporated water molecules

使用温度可变的红外光谱，观察到的血液相容性聚合物材料中的水分子的重结晶现象（在加热过程中的水分子结晶）可以归因于单体或低聚物水分子的状态变化，而不是无定形冰到结晶冰的转变，这否认了具有特定氢键网络的水分子的存在。此外，对几种无血液相容性高分子材料中水分子的红外光谱测量也表明了重结晶现象的存在。将玻璃化转变温度与聚合物中元素的组成进行比较，表明重结晶现象与聚合物链的流动性和水分子与聚合物之间的静电相互作用密切相关。

Using temperature-variable infrared spectroscopy, recrystallization phenomena (crystallization of water molecules during the heating process) observed for water molecules incorporated in blood-compatible polymer materials could be ascribed to state changes of monomeric or oligomeric water molecules and not to the transition of amorphous ice to crystal ice, which denied the presence of water molecules having a specific hydrogen-bonded network. Furthermore, the infrared measurements of water molecules incorporated in several kinds of polymer materials without blood compatibility indicated the presence of recrystallization phenomena, too. Comparing the glass transition temperature with the composition of elements in the polymers indicated that the recrystallization phenomena are strongly related to the mobility of polymer chains and the electrostatic interaction between water molecules and the polymers.