醋酸纤维素／聚乙烯基吡咯烷酮共混体系的特殊相互作用表征（Ⅱ）

通过测定醋酸纤维素（ＣＤＡ）和聚乙烯基吡咯烷酮（ＰＶＰ）共混物溶液的绝对粘度和特性粘数，发现ＣＤＡ和ＰＶＰ分子链段间有缔合现象，用富里哀变换红光谱（ＦＴＩＲ）研究了共混物的吸收光谱，发现共混物中ＣＤＡ的羟基吸收峰和ＰＶＰ的羰基吸收峰均向低频方向迁移，证明了ＣＤＡ的羟基和ＰＶＰ的羧基之间有氢键形成，研究结果表明ＣＤＡ和ＰＶＰ的相容性及其特殊相互作用来源于不同分子链段间的氢键相互作用。

INVESTIGATION OF SPECIFIC INTERACTION FOR MISCIBLE CELLULOSE DIACETATE/POLY (VINYL PYRROLIDONE)

The absolute viscosity and the intrinsic viscosity were measured forCDA/PVP solutions. The experimental results suggested that molecular chains ofCDA and PVP were strongly associated together. FTIR was used to investigate onthe nature of the association of molecular chains of CDA and PVP. Hydrogen bondswere formed between hydroxy groups of CDA and carbonyl groups of PVP.Themiscibility of CDA with PVP were introduced by the specific interaction of hydrogen bonds.