固体填料对聚乙二醇结晶性的影响

采用DSC、WAXD技术研究了固体填料 (Al粉、奥克托金 (HMX)、高氯酸铵 (AP) )对聚乙二醇结晶性的影响 .Al粉及HMX不影响混合物中PEG的结晶度及晶体结构 ,高氯酸铵与PEG之间存在较强的相互作用 ,降低了混合物中PEG的结晶度 .某些金属盐也与PEG之间存在类似的相互作用 ,这种相互作用以金属盐溶于PEG熔体为前提 .高氯酸铵及金属盐导致PEG结晶度的降低是由于其阳离子与PEG分子链中的氧原子形成了络合物 ,增强了二者之间的相互作用 .

EFFECT OF SOLID FILLERS ON THE CRYSTALLIZATION OF POLYETHYLENE GLYCOL

The effect of solid fillers (Al,cyclotetramethylene tetranitramine (HMX),ammonium perchlorate (AP)] on the crystallization behavior of PEG was studied by using DSC and WAXD techniques.Al and HMX have no effect on the crystallinity and crystal structure of PEG in composites.There is a strong interaction between AP and PEG,which decreases the crystallinity of PEG in the mixtures.Some other metal salts have shown the same strong influence on the crystallization of PEG like AP.It was found that they all are soluble in PEG melt.The decrease of crystallinity of PEG in the presence of AP and other metal salts is attributed to the formation of complex between the metal cations and the oxygen atoms of PEG molecules,which prevents the crystallization of PEG molecules in the composites.