引入离子基团改善聚苯乙烯与热致液晶聚合物的相容性 Ⅱ用FTIR研究分子间特殊相互作用  

MISCIBILITY ENHANCING IN POLYSTYRENE BLENDS WITH A LIQUID CRYSTALLINE POLYMER VIA INCORPORATING IONIC GROUPS Ⅱ.FTIR INVESTIGATION OF INTERMOLECULAR INTERACTIONS

作　　者：刘杰[1] 何嘉松[1] 陈士娟[1] 

机构地区：[1]中国科学院化学研究所工程塑料国家重点实验室

出　　处：《高分子学报》1998年第3期276-281,共6页Acta Polymerica Sinica

基　　金：自然科学基金

摘　　要：向聚苯乙烯（ＰＳ）中引入磺酸基团可以有效地改善ＰＳ与一种热致液晶聚合物（ＬＣＰ）之间的相容性．用溶液共混的方法制备了ＰＳ和磺化聚苯乙烯（ＨＳＰＳ）与ＬＣＰ的共混物．用ＦＴＩＲ以及红外光谱的合成技术对ＬＣＰ共混体系进行了表征．共混物中组分聚合物特征吸收的位置和谱图的形状表明在ＬＣＰ与ＰＳ分子间没有相互作用发生，而在ＬＣＰ与ＨＳＰＳ分子间则存在较强的相互作用．谱图差减技术确认了ＬＣＰ分子中ＣＯ与ＣＯ基团和ＨＳＰＳ中的磺酸基团参与了相互作用，使得这些基团的特征吸收发生了偏移．Presents the FTIR spectra and spectral manipulatioins of liquid crystalline polymer (LCP) blends with polystyrene (PS) and modified polystyrene,lightly sulfonated polystyrene (HSPS).Earlier DSC and SEM studies have demonstrated that HSPS is completely miscible with LCP,although their molecular structure differs greatly from each other,whereas PS is immiscible with LCP.FTIR study now elucidates the origin of miscibility enhancing is the presence of specific interactions involving the carbonyl groups and CO groups in the LCP and sulfonate groups in the HSPS molecular chains,resulting in very intimate mixing of the HSPS with the LCP′s segment. 

关 键 词：聚苯乙烯 LCP 热致液晶聚合物 共混物 相容性 

分 类 号：O632.13[理学—高分子化学]