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关于含有芳香叔胺基的烯类单体,我们曾报道过N,N-二甲氨基苯乙烯,N-(4—N′,N′-二甲氨基苯基代丙烯酰胺(DMAPAA),N-(4-N′,N′-二甲氨基苯基代甲基丙烯酰胺(DMAPMA),甲基丙烯酸-4-N,N-二甲氨基苄脂(DMABMA),8-丙烯 相似文献
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<正> 我们曾报道过甲基丙烯酸-4-N,N-二甲氨基苄酯(DMABMA),4-N,N-二甲氨基苯乙烯(DMAS)等含芳香叔胺基的烯类衍生物不仅可以作为氧化还原引发体系组分引发烯类单体如甲基丙烯酸甲酯(MMA)的聚合,而且还进入MMA的聚合物链中。在另文中报道了两个芳香叔胺取代的丙烯酰胺:N-(4-N′,N′-二甲氨基苯基)丙烯酰胺(DMAPAA)和N-(4-N′,N′-二甲氨基苯基)甲基丙烯酰胺(DMAPMA)的合成及其聚合的研究,本文研究了这两个丙烯酰胺衍生物与过氧化苯甲酰(BPO)组成的氧化还 相似文献
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<正> 前文报道了含芳香叔胺基丙烯酸酯-甲基丙烯酸4-N,N-二甲氨基苄酯(DMABMA)的合成和聚合。这种在分子中既含有二甲氨基苯基,又含有双键的单体为“可聚合芳香叔胺”,在过氧化二酰如过氧化苯甲酰(BPO),过氧化月桂酰(LPO)引发下,芳香叔胺残基参与氧化还原引发体系,进而双键发生聚合反应。本文报道了二甲氨基苯基取代丙烯酰胺,即N-(4-N,N‘-二甲氨基苯基)丙烯酰胺(DMAPAA)和N-(4-N,N-二甲氨基苯基)甲基丙烯酰胺(DMAPMA)的合成及聚合。 相似文献
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含甲基丙烯酸-N,N-二甲氨基乙酯水凝胶的紫外辐射合成及其性质研究 总被引:6,自引:2,他引:4
紫外光辐照 ,H2 O2 为光引发剂 ,N ,N′ 亚甲基双丙烯酰胺为交联剂合成了含甲基丙烯酸 N ,N 二甲氨基乙酯的水凝胶 .研究了水溶液中单体、光敏引发剂、交联剂浓度及光照时间对生成的水凝胶的凝胶含量和溶胀性能的影响 ,给出了最佳合成条件 .用该聚合法合成的聚甲基丙烯酸 N ,N 二甲氨基乙酯水凝胶不仅具有较好的透明性和适当的弹性 ,而且在 40℃和 pH =3时有明显的温度及 pH敏感性 .但离子强度对凝胶溶胀性能没有明显影响 相似文献
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含胺基功能性单体的聚合研究 XIV.含二甲氨基丙烯酰类衍生物与过硫酸钾引发体系引发的丙烯酰胺聚合 总被引:1,自引:7,他引:1
The polymerization of acrylamide (AAm) initiated by the combination of N-(N', N'-dimethylaminomethylene)methacrylamide (DMAMMA) or N, N,-dimethylaminoethyl methacry-late with potassium persulfate were studied kinetically. The rate equation for the AAm polymerization initiated by the above initiation systems were given asRp- Kp[AAm][K2S2O8]1/2[DMAMMA]1/2 Rp=Kp[AAm][K2S2O8]1/2[DMAEMA]1/2 respectively. The overall activation energies for the above polymerization were determined to be 8.7 Kcal/mol and 9.2 Kcal/mol respectively. The UV analysis for the PAAm initiated by the above initiation systema showed that the polymerizable amines,DMAMMA and DMAEMA notonly joined the redox initiation but also incorprated into the AAm polymer chains. The super high molecule weight,107of PAAm were obtained by using these initiation systems. 相似文献
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本文报道了以甲基丙烯酸-N,N-甲氨基乙酯(DMAEMA)与过硫酸盐体系以引发的丙烯酰吗啉(AMP)的水溶液聚合,得到下列方程:Rp[K2S2O8]0.46[DMAEMA]0.49[AMP]1.09;Ea=30.21KJ/mol。试用四氯乙烯(TCNE)处理的丙烯酸吗啉聚合物P(AMP)的紫外光谱分析,发现DMAEMA不仅参与引发AMP聚合,而且还进入P(AMP)分子链中。P(AMP)分子量比聚丙烯酰腹P(AAm)的小,而且随AMP(DMAEMA或温度)增加而增加(降低)。P(AMP)及其轻度交联的水凝胶表现出热敏性。 相似文献
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N-甲基丙烯酰-N'-嘧啶哌嗪与过硫酸钾引发体系引发的丙烯酰胺聚合 总被引:4,自引:0,他引:4
queous solution polymerization of acrylamide (AAm) was demonstrated by using initiation system consisting of N-methacryloyl-N '-pyrimidinopiperazine (MPMP ) and persulfate (KPS). The polymerization rate equation was obtained to beRp = Kp[MPMP]1/2 [KPS]1/2 [AAm]1.0The overall activation energy for the polymerization was calculated by Arrhenius quation to be Ea= 5.6 KJ/mol. The redox nature for the polymerization was clarified. A super high molecular weight up to 107 of PAAm was obtained by using this initiation system. From the fluorescent analysis, it was confirmed that MPMP not only acted as a component of the redox system, but also entered into the acrylamide polymer chains. 相似文献
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Manabu Ishifune Ryuhei Suzuki Mikio Yamane Hiroyuki Tanabe Yuki Nakagawa Kumao Uchida 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(7):523-528
Acrylamide (AAm) was found to polymerize in a solution of poly(N‐isopropylacrylamide) (PNIPAAm) in water at around its lower critical solution temperature (LCST) (32°C) without any initiators. This phenomenon was specifically observed in aqueous solutions of the polymers having LCST such as PNIPAAm and poly(methylvinylether) (PMVE). AAm polymerized only when PNIPAAm and AAm were dissolved in water below LCST of PNIPAAm and then the solution was warmed up to the polymerization temperature (40°C). On the other hand, the polymerization of AAm did not proceed when AAm was added into aqueous PNIPAAm solution during and after the phase separation above 32°C. Furthermore the polymerizability of AAm was remarkably affected by the concentration and molecular weight of the PNIPAAm additives. Under the condition of lower PNIPAAm concentration (0.30 mol/L), the increase in the molecular weight of PNIPAAm considerably increased the molecular weight of the resulting PAAm but decreased the yield of PAAm. Under the condition of higher PNIPAAm concentration (0.60 mol/L) the polymerizability was not so affected by the molecular weight of PNIPAAm, while the molecular weight of PAAm formed by using higher molecular weight PNIPAAm was higher than those of PAAm formed by using lower molecular weight PNIPAAm. Moreover, the molecular weight of PAAm formed by the PNIPAAm induced polymerization of AAm was much higher than that of the polymer obtained by the radical polymerization using AIBN in THF or VA‐ 061 in water. 相似文献
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