中华医学超声杂志

应用化学 ›› 1990, Vol. 0 ›› Issue (3): 47-50.

• 研究论文 • 上一篇    下一篇

PVA/PVP共混物的聚集态结构

张宏放, 莫志深, 薛小芙, 殷敬华   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1989-04-17 修回日期:1989-09-12 出版日期:1990-06-10 发布日期:1990-06-10
  • 基金资助:
    国家自然科学基金

AGGREGATE STRUCTURE OF PVA/PVP BLENDS

Zhang Hongfang, Mo Zhishen, Xue Xiaofu, Yin Jinghua   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-04-17 Revised:1989-09-12 Published:1990-06-10 Online:1990-06-10

PDF

383

被引次数

11

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。

关键词: 聚乙烯醇/聚吡咯烷酮共混物, 大角X射线衍射, 结构, 热处理

Abstract: 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.

Key words: PVA/PVP blend, WAXD, structure, heat treatment

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