摘要
热处理前后不同组份比二元共混物聚乙烯醇(PVA)和聚乙烯吡咯烷酮(PVP)的聚集态结构研究表明,热处理可明显提高共混物的结晶性。热处理前样品仅观察到(101)晶面衍射,热处理后可观察到4个以上衍射晶面。结晶度和微晶大小随共混物中PVP含量增加而降低。第二类晶格畸变则随PVP含量增加而增大。
The structure of poly(vinyl alcohol) (PVA)/poly(vinyl pyrrolidone) (PVP) blends of va-rious compositions has been studied by wide angle X-ray diffractometry before and afterheat treatment. The plane (101) was observed only at 2θ= 11 .4°before heat treatment, butover four planes were found after heat treatment. The degree of crystallinity and crystal-lite size were decreased with increasing the PVP content in blends. Applying Hosemann'sconcept of paracrystallinity as well as Cauchy and Gaussian function approximations,parameters of the crystallite size, strain and the second kind lattice distortion have beencalculated.
出处
《应用化学》
CAS
CSCD
北大核心
1990年第3期47-50,共4页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
