摘要
用 FT-IR方法研究 PP/ EPDM共混物表面与本体的结晶形态 ,结果表明 ,随着 EPDM含量的增加 ,997cm-1吸收峰的位置不变 ,但峰宽变小 ,测算 PP的结晶度的 A998/ A972 比值随着变化 ;从表面与本体比较来看 ,一是表面PP结晶状态吸收峰是在 997.0 cm-1,而本体在 997.8cm-1即向低波数方向移动 ;二是表面非结晶状态吸收峰 972cm-1增加较多 ,这都说明共混物表面与本体 PP结晶度及形态有较大的差别。
The crystallinity and morphology in surface and buld of PP/EPDM blends were studied by FT IR and FT IR ATR. As the content of EPDM in the blends increases, the width of 997 cm -1 band which is characteristic of PP segments at least five monomers helical conformation gradually decreases, and the intensity ratio of 997/972 used for determining the degree of crystallinity are change. There are lower frequency (from 997.8 cm -1 to 997.0 cm -1 ) and heigher 997 cm -1 band at the surface of PP/EPDM blends. The results show a lower PP degree of crystallinity and more complex crystalline morphology at surface of PP/EPDM blends.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2000年第2期158-160,共3页
Polymer Materials Science & Engineering
