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用DSC、FTIR、SAXS和测定Flory-Huggins相互作用参数等方法对聚乙二醇(PVA1)/聚乙烯基吡咯烷酮(PVP)共混体系的研究。结果表明,该体系具有完全互容的性质。共混物只有一个玻璃化转变温度。用DMSO作溶剂浇铸的膜光学透明。PVA1的长周期和片晶厚度均随PVP含量增加而增大,但后者增大的幅度比前者小得多,表明PVP和PVA1的非晶部分形成均相并夹入到球晶内部。共混物中PVP羰基吸收峰和PVA1的羟基吸收峰与相应均聚物相比,在红外光谱图中皆向低频方向迁移,迁移波数随第二组分含量的增加而增大。表明二者间有氢键生成。用平衡熔点计算的Flory-Huggins相互作用参数为-0.88。
The study on the blend system of PVA1 / PVP with DSC, FTIR, SAXS and Flory-Huggins interaction parameters and so on. The results show that the system has a completely mutual-compatible nature. The blend has only one glass transition temperature. Membranes optically cast with DMSO as solvent were optically clear. The long period and lamella thickness of PVA1 increased with the increase of PVP content, but the latter increased by a much smaller extent than the former, indicating that the amorphous parts of PVP and PVA1 were formed in homogeneous phase and intercalated into the spherulites. Compared with the corresponding homopolymers, the absorption peak of PVP and the absorption peak of hydroxyl group of PVA1 in the blend all migrated to lower frequency in the infrared spectrum, and the migration wave number increased with the increase of the content of the second component. Show that there is hydrogen bond between them. The Flory-Huggins interaction parameter calculated using the equilibrium melting point is -0.88.