改性埃洛石纳米管中甲基丙烯酸甲酯的ARGET ATRP聚合

发布时间：2018-05-17 19:03

本文选题：微反应器 + 聚合　；参考：《化工进展》2017年04期

【摘要】：受限空间内进行自由基聚合有望获得特殊性能的产物或新材料。采用4种硅烷偶联剂KH151、KH550、KH560、KH570分别对埃洛石纳米管(HNTs)进行了改性,将改性埃洛石纳米管(HNTs-M)作为"受限空间",在其内部进行甲基丙烯酸甲酯(MMA)的电子转移活化再生催化剂原子转移自由基聚合反应(ARGET ATRP)。通过XRD、TEM、SEM、FTIR、TGA、N2吸附/脱附、GPC、~1H NMR等测试方法对HNTs-M、HNTs-M/PMMA复合材料及其孔道内PMMA进行了分析表征。结果表明,改性后和聚合后的HNTs比表面积、孔容及孔径依次降低,且晶型结构没有被破坏,孔道内的PMMA以无定形结构形式存在。与常规聚合所得的PMMA相比,孔道内部聚合所得的PMMA的分子量、热稳定性、等规立构含量有所提高,且分子量分布仍然较窄,但间规立构含量有所降低。
[Abstract]:Free radical polymerization in confined space is expected to obtain products or new materials with special properties. HNTs were modified by four silane coupling agents KH151 (KH 151) KH 550 KH 560 KH 570, respectively. HNTs-M) was used as a "limited space" for the electron transfer activation of methyl methacrylate (MMA). The atom transfer radical polymerization reaction was carried out on the catalyst for atom transfer radical polymerization (ARGET ATRPP). The HNTs-M / M / PMMA composites and their PMMA in pore channels were characterized by XRDX Tem SEMU FTIR TGAN 2 adsorption / desorption (GPCN) 1H NMR. The results show that the specific surface area, pore volume and pore size of the modified and polymerized HNTs decrease in turn, and the crystalline structure is not destroyed, and the PMMA in the pore exists in the form of amorphous structure. Compared with the PMMA prepared by conventional polymerization, the molecular weight, thermal stability and isotactic content of the PMMA obtained by the internal polymerization of the pore are increased, and the molecular weight distribution is still narrow, but the syndiotactic content is decreased.
【作者单位】：桂林理工大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51263004,21664005)
【分类号】：O631.5

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