摘要
用ＷＡＸＤ和ＦＴ－ＩＲ对高温超高压处理前后的ＨＤＰＥ进行了研究。发现经５．０ＧＰａ的高压处理或２００℃下４．０ＧＰａ的高压同时处理后的ＨＤＰＥ分子链的化学结构未发生变化。ＨＤＰＥ晶体中（２００）面与（１１０）面衍射峰的峰高比（γ）随着压力的升高而增大，表明ＨＤＰＥ分子链在超高压作用下发生了取向排列，且升高温度更有利于这种取向排列，但当压力增大至５．０ＧＰａ及温度升高至２００℃时，γ反而大幅度下降。
The chemical sturcture of HDPE molecular chain do not change under high pressure up to 5.0 GPa or 4.0 GPa at high temperature up to 200 ℃. The height ratio ( γ ) of (200) peak to (110) peak associated with HDPE crystal structure varies as the pressure increases, which demonstrated HDPE molecular chains have oriented under ultrahigh pressure. To increase temperature is favourable to the orientation of HDPE molecular chains under ultrahigh pressure. Nevertheless, the height ratio decreases remarkably under high pressure up to 5.0 GPa or high temperature up to 200 ℃ .
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1996年第6期131-134,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金
关键词
高密度聚乙烯
高温
超高压
结晶
聚乙烯
HDPE, high temperature, ultrahigh pressure, crystal, orientation[L
