摘要
采用熔融插层法成功制备了接枝物(PP-g-MAH)/有机蒙脱土(Org-MMT)纳米复合材料,用X射线衍射法检测了复合材料的层间距、微晶尺寸和晶胞参数的变化,并考察了纳米复合材料的力学性能。结果发现,对于PP-g-MAH/Org-MMT=100∶20的复合材料,接枝物大分子链难以插层进入有机蒙脱土片层间。增大PP-g-MAH/Org-MMT比例,接枝物大分子链能插层进入有机蒙脱土片层,形成插层型纳米复合材料。PP-g-MAH/Org-MMT=100∶10时,PP-g-MAH/Org-MMT复合材料110、040、041等晶面垂直于反射方向的微晶尺寸出现最小值,且可获得较好的力学性能,说明选择适当的接枝物/有机蒙脱土比例可降低聚丙烯的微晶尺寸,改善力学性能,但对复合材料晶胞参数的影响较小。
PP-g-MAH/Org-MMT nanocomposites were synthesized successfully by melt-direct intercalation method. X-ray method was employed to investigate the changes of interlayer distance, microcrystal sizes and crystal cell parameters in the nanocomposites. Moreover, mechanic property of nanocomposites was also been investigated. The results show that when the ratio of PP-g-MAH to Org-MMT is above 100∶20 macromolecule of polypropylene grafted by maleic acid (PP-g-MAH) can intercalate into layers of montmorillonite. Accordingly nanocomposites were synthesized successfully. When the ratio of PP-g-MAH to organic montmorillonite (Org-MMT) is 100∶10, overall excellent mechanic properties are obtained. The sizes of microcrystal perpendicular to the every crystal planet (such as 110 and 040) obtain the minimum value when the ratio of PP-g-MAH to Org-MMT is 100∶10. It shows that proper addition of Org-MMT can induce microcrystal size to decrease. The addition of Org-MMT has insignificant influence on crystal structure parameters.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2003年第6期123-125,130,共4页
Polymer Materials Science & Engineering
基金
安徽省自然科学基金资助项目(99046317)
