共查询到19条相似文献,搜索用时 140 毫秒
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在同一分子中既含有电子给体基团,又含有电子受体基团的单体,如甲基丙烯酸二甲氨基苄酯(DMABMA),N-(4-N′,N′-二甲氨基苯基)代丙烯酰胺(DMAPAA)及其聚合物的荧光光谱颇为有趣。 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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我们曾报道了含芳香叔胺基功能性单体的合成及其聚合的研究,这些单体都是既参与引发反应又参与聚合的“引发剂单体”。本文报道了一种含有芳香叔胺基的新单体——N-丙烯酰-N′-苯基哌嗪(APP)和N-甲基丙烯酰-N′-苯基哌嗪(MPP)的合成及其光聚合。由于APP或MPP含有芳香叔胺基,它们和过氧化苯甲酰(BPO)配合, 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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N-(2-乙烯氧乙基)-1,8-萘二甲酰亚胺聚合物与共聚物的荧光行为 总被引:2,自引:0,他引:2
<正> 我们曾报道过一系列含有给电子生色基团的丙烯酰类单体如甲基丙烯酸二甲氨基苄酯、N-(N′,N′-二甲氨基苯基)丙烯酰胺类、8-丙烯酰氧喹啉类、N-丙烯酰-N′-苯基哌嗪类、N-丙烯酰-N′-嘧啶哌嗪类、N-甲基丙烯酰氧乙基-N-甲基代苯胺等的合成、聚合、引发行为以及它们的聚合物的荧光行为。这些单体结构的共同点在于其双键为缺电子性而生色基团为给电子性,因而在荧光行为上,由于生成激基复合物或电荷转移而发生荧光 相似文献
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The photopolymerization of AN by using N-acryloyl-N'-phenylpiperazine (APP) and N-methacryloyl-N'-phenylpiperazine (MPP) as sensitizers under UV irradiation has been investigated. The corresponding polymerization kinetic equations are as follows:Rp [APP]0.81[AN]0.61 Rp [MPP]0.48[AN]0.77 Rp [P(APP)]0.53[AN]0.78 From the fluorescent analysis, it was confirmed that APP, MPP and P(APP) not only initiated the polymerization of AN but also entered into the chains of AN polymer. The photopolymerization mechanism for exciplex formation of AN with above sensitizers was proposed. 相似文献
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GAO Qing-yu * LIU Zhi-gui GUAN Hui-li YANG Geng-xu YU Xian-da . Laboratory of Lubrication Functional Materials Henan University Kaifeng P.R. China . Lanzhou Institute of Chemistry Physics Chinese Academy of 《高等学校化学研究》2002,18(1):56-60
IntroductionWe have reported the syntheses of vinylmonomers bearing chromophores[1— 8] ,such as N -acryloyl- N′- 2 - pyrimidinylpiperazine,4- (N,N-dime- thylamino) benzyl methacrylate,N - acryloyl-N′- diphenylpiperazines,N- (4- dimethy-laminophenyl ) maleimide,N- (4- dimethy-laminophenyl) itaconimide,N- acryloylphenothiateetc.and their photochemical and photo- initiationbehaviors. Owing to the electron- donating chro-mophore and electron- accepting double bonds coex-isting in the same mo… 相似文献
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本文研究了酚噻嗪(PTZ)引发丙烯腈(AN)的光聚合。测定了聚合速率Rp=K[AN]1.47[PTZ]0.41及活化能Eα=7.1千卡/摩尔。从PTZ与AN在光照下形成激基复合物的机制讨论了引发聚合机理。 相似文献
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Fu-Mian Li Shuang-Ji Chen Zi-Chen Li Jian Qiu 《Journal of polymer science. Part A, Polymer chemistry》1996,34(10):1881-1888
Two novel acrylic monomers bearing aromatic tertiary amino groups, i.e., N-acryloyl-N′-phenylpiperazine (APP) and N-methacryloyl-N′-phenylpiperazine (MPP) are synthesized by the reaction of N-phenylpiperazine and the corresponding acryloyl chlorides in the presence of triethylamine. They can be polymerized easily by using AIBN as an initiator or photopolymerized without any sensitizer. The photochemical behavior of APP, MPP, and their polymers are explored by recording the fluorescence spectra in solution. It has been found that the fluorescence intensities of these monomers are dramatically lower than those of their polymers in the same chromophore concentration, and such phenomenon is termed as “structural self-quenching effect” (SSQE). The strong fluorescence of these polymers can be quenched by adding electron-deficient monomers which have no chromophore moieties such as MMA, AN, etc., and their Stern–Volmer constants are determined. It is observed that the higher the electron-deficiencies of the quenchers, the higher the Stern–Volmer constants, which means stronger quenching effect. The SSQE displayed by APP and MPP make them useful as probes to pursue their photopolymerization process. As polymerizable aromatic tertiary amines, APP and MPP themselves or combining with organic peroxides such as BPO can initiate the photopolymerization or thermal polymerization of vinyl monomers such as MMA, AN by free radical nature, and at the same time enter the polymer chain. © 1996 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 34:1881–1888, 1996 相似文献
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含胺基功能性单体的聚合研究——Ⅻ.N-丙烯酰-N′-苯基哌嗪类的合成、光聚合及其作为氧化还原引发体系组分的研究 总被引:1,自引:5,他引:1
N-acryloyl-N'-phenylpiperazine (APP) and N-methacryloyl-N'-phenylpiperazine (MPP) were synthesized by the reaction of N-phenylpiperazine with corresponding acryloyl chlorides. The solution of these polymers display the fluorescence phenomenon, but these monomers do not. APP and MPP can be photopolymerized under the UV irradiation. The rate equation of MMA polymerization initiated by APP and BPO is given as RP = [APP]0.5 [BPO]0.5 [MMA] . The redox initiation system would be formed by the. combination of APP and BPO.APP not only initiates the polymerization of MMA ,but also incorporates into the MMA polym-er chains. 相似文献
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Abstract The binary system of tetramethyl tetrazene (TMT) and Co(II) chloride was used as initiator of acrylonitrile (AN) in dimethylformamide. The initial rate of polymerization (Rp) was found to be expressed by Rp = k[TMT]0.62[Co(II) chloride]0.57 [AN]2.00 The polymerization was confirmed to proceed via a radical mechanism. The over-all activation energy for the polymerization was estimated as 15.1 kcal/mole. On the basis of these results and the product analysis of the reaction between the catalyst components in the absence of monomer, the initiation mechanism of the polymerization is discussed. 相似文献