| 聚N-甲基-N-(2-甲基丙烯酰氧乙基)-对-甲苯胺的荧光光谱及光诱导接枝丙烯腈共聚合 |
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| 引用本文： | 张璋华,丘坤元,马新德. 聚N-甲基-N-(2-甲基丙烯酰氧乙基)-对-甲苯胺的荧光光谱及光诱导接枝丙烯腈共聚合[J]. 高分子学报, 1993, 0(2) |
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| 作者姓名： | 张璋华 丘坤元 马新德 |
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| 作者单位： | 北京大学化学系,北京大学化学系,北京大学化学系 北京,邮政编码:100871,北京,邮政编码:100871,北京,邮政编码:100871 |
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| 摘 要： | 文献[1]报道N-甲基-N-(2-甲基丙烯酰氧乙基)苯胺(MEMA)单体,由于同一分子中含有缺电子碳碳双键和给电子发色基团(芳叔胺氮上孤对电子),因此当链节克分子浓度相等时,单体的荧光强度要比其均聚物的荧光强度低得多,归之为单体“结构自猝灭”所致。这是由于共存在单体分子中的吸电子双键基团和给电子的荧光基团在光照下于分子内或分子间产生激基复合物所致。这种现象称为“结构自猝灭现象”。聚合物无双键存在,因而其荧光强度比单体高得多。
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| 关 键 词： | N-甲基-N-(2-甲基丙烯酰氧乙基)-对-甲苯胺 均聚物与共聚物 荧光光谱 光敏化接枝聚合 |
FLUORESENCE SPECTRA OF POLY [N-(2-METHACRYLO- YLOXYETHYL)-N-METHYL-PARA-TOLUIDINE] AND PHOTOINDUCED GRAFT COPOLYMERIZATION OF ACRYLONITRILE |
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| ZHANG Zhanghua,QIU Kunyuan,FENG Xinde. FLUORESENCE SPECTRA OF POLY [N-(2-METHACRYLO- YLOXYETHYL)-N-METHYL-PARA-TOLUIDINE] AND PHOTOINDUCED GRAFT COPOLYMERIZATION OF ACRYLONITRILE[J]. Acta Polymerica Sinica, 1993, 0(2) |
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| Authors: | ZHANG Zhanghua QIU Kunyuan FENG Xinde |
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| Abstract: | The fluoresence behavior of N (2-methacryloyloxyethyl)-N-methy-p-toluidine (MEMT) monomer and its polymer has been investigated. It was observed that the monomer's fluoresence emission intensity was always lower than that of its polymer. This phenomenon was ascribed to the "structural self-queching effect". From the Stern-Volmer plots, the fluoresence quenching constant of PMEMT by different quenchers, i. e., methacrylonitrile (MAN), acrylo-nitrile (AN) fumadinitrile (FN), tetracyanoethene (TONE), methyl acrylate (MA), methyl methacrylate (MMA) were evaluated respectively. The more the electron-poor of monomers (quenchers) the higher values of fluoresence quenching constants were obtained. MEMT itself would photo-induced AN polymerization. In the presence of benzophenone (BP) and under UV light irradiation, photo-induced graft copolymerization of AN onto PMEMT and P(ME-MT-co-MA) would take place. The grafted polymers obtained were characterized by FT-IR spectra. |
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| Keywords: | N-(2-methacryloyloxyethyl)-N-methyl-p-toulidine Homopolymer and co- polymers Fluoresence spectra Fluoresence quenching Photo-induced AN graft copolymeriza- tion |
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