STUDY ON DIRECT RADIATION GRAFTING OF THERMO—SENSITIVE NIPAAm ONTO SILICONE RUBBER AND THE CHARACTERIZATION OF THE GRAFTED FILMS

LI Jun; ZHAI Maolin; YANG Pengxiang; GAO Hongcheng; HA Hongfei

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STUDY ON DIRECT RADIATION GRAFTING OF THERMO—SENSITIVE NIPAAm ONTO SILICONE RUBBER AND THE CHARACTERIZATION OF THE GRAFTED FILMS

更新时间：2023-04-07

- STUDY ON DIRECT RADIATION GRAFTING OF THERMO—SENSITIVE NIPAAm ONTO SILICONE RUBBER AND THE CHARACTERIZATION OF THE GRAFTED FILMS
- Journal of Radiation Research and Radiation Processing Vol. 17, Issue 2, Pages: 65-69(1999)
- 作者机构：
  
  1.北京大学技术物理系　北京　100871
- 作者简介：
- 基金信息：
  
  Foundation of Nuclear Science(Y7197FY006)
- DOI：
  CLC：
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LI Jun, ZHAI Maolin, YANG Pengxiang, et al. STUDY ON DIRECT RADIATION GRAFTING OF THERMO—SENSITIVE NIPAAm ONTO SILICONE RUBBER AND THE CHARACTERIZATION OF THE GRAFTED FILMS. [J]. Journal of Radiation Research and Radiation Processing 17(2):65-69(1999)
DOI：

LI Jun, ZHAI Maolin, YANG Pengxiang, et al. STUDY ON DIRECT RADIATION GRAFTING OF THERMO—SENSITIVE NIPAAm ONTO SILICONE RUBBER AND THE CHARACTERIZATION OF THE GRAFTED FILMS. [J]. Journal of Radiation Research and Radiation Processing 17(2):65-69(1999) DOI：

摘要

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。

Abstract

In this work, the direct radiation graft polymerization of NIPAAm onto silicone rubber was performed. It was found that the grafting yield was increased with dose up to 40kGy, but decreased with dose rate from 50 to 500 Gy/min. The graft reaction could be performed in air,but it had a obvious induction period. The grafting was also enhanced by raising concentration of monomers and by acid as well. The characterization of grafted films was measured. The surface of the grafted films exhibited thermal sensitivity and the LCST of them closed to 35 ℃ (by DSC) , so the differences of swelling percent in water at different temperature (below or above LCST) was observed obviously. The surface morphology of the samples was observed by SEM.

关键词

硅橡胶氮异丙基丙烯酰胺共辐射接枝温度敏感性聚合物表面改性

Keywords

Silicone rubberNIPAAmDirect radiation graftingThermo —sensitive polymerSurface modification

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