论文部分内容阅读
采用共辐射方式将ＰＮＩＰＡＡｍ接枝到硅橡胶上，结果表明在实验条件下，随吸收剂量的增加（到４０ｋＧｙ），接枝率增加；但随剂量率的增加（５０～５００Ｇｙ／ｍｉｎ），接枝率反而下降。此接枝反应可以在空气中进行，但有一个明显的诱导期。增大单体的浓度和加入少量无机酸也能提高接枝率。接枝后，膜表面也表现出温度敏感性，其ＬＣＳＴ接近３５℃（ＤＳＣ），所以在不同温度下（低于或高于ＬＣＳＴ），它在水中的溶胀程度有明显差异。在扫描电镜下观察了接枝样品的表面形态。
The grafting of PNIPAAm onto silicone rubber by co-irradiation showed that the grafting rate increased with the increase of absorbed dose (up to 40kGy) under the experimental conditions. However, with the increase of dose rate (50-500Gy / min) Branch rate but decreased. This grafting reaction can be carried out in the air, but with a clear induction period. Increasing the monomer concentration and adding a small amount of mineral acid can also improve the grafting rate. After grafting, the membrane surface also exhibits temperature sensitivity with an LCST close to 35 ° C (DSC), so there is a significant difference in swelling in water at different temperatures (lower or above LCST). The surface morphology of grafted samples was observed under scanning electron microscope.