The fluoro-polyester resins(F-UPR ) were synthesized from tetrafluoro- o -phthahic acid, maleic acid and propanediol in order to introduce the fluorine atom into the unsaturated polyester resin(UPR) chains and improve...The fluoro-polyester resins(F-UPR ) were synthesized from tetrafluoro- o -phthahic acid, maleic acid and propanediol in order to introduce the fluorine atom into the unsaturated polyester resin(UPR) chains and improve their properties. The result indicated that the product has viscosity 0 21 Pa·s (25 ℃), about half of that of the common unsaturated polyester resins (0 39 Pa·s, 25 ℃) and the contact angle between water and cured F-UPR was 64°. The water-resistant ability and acid-resistant ability of the resin were improved. The spectral and thermo-stability test results of the F-UPR showed that the UV-curing process of F-UPR could be completed within 40 min and the total mass loss of UV-cured F-UPR was 94 6% with thermodestruction temperature being 373 ℃.展开更多
A β-diketone-bridged chromophore-containing acrylic monomer, 1-(4-dimethylaminophenyl)-4-methyl-4-pentene-1,3-diketone(DMPDK) and its saturated model compound, 1-(4-dimethyl aminophenyl)-1,3-butanedione(DMBDK) were s...A β-diketone-bridged chromophore-containing acrylic monomer, 1-(4-dimethylaminophenyl)-4-methyl-4-pentene-1,3-diketone(DMPDK) and its saturated model compound, 1-(4-dimethyl aminophenyl)-1,3-butanedione(DMBDK) were synthesized and investigated by spectroscopy. It was found that the fluorescence intensity of DMPDK was much lower than that of DMBDK at the same concentration, which indicates that DMPDK, a β-diketone-bridged acrylic monomer having chromophore moiety, also showed fluorescence structural self-quenching effect(SSQE). Photo-induced tautomerization of DMBDK in acetonitrile was studied by means of UV and fluorescence spectroscopy. The results imply that the fluorescence method is capable of monitoring tautomerization of some fluorescent β-diketones.展开更多
合成了一种新型感光性单体丙烯酸(4 N,N 二甲氨基肉桂酰氧乙基)酯(DMACEA)及其与丙烯酸的共聚物P(DMACEA co AA).用紫外吸收和荧光光谱研究了聚合物溶液的光敏感性,用傅立叶红外光谱研究了聚合物成膜后的光交联性及其过程.结果表明:DMA...合成了一种新型感光性单体丙烯酸(4 N,N 二甲氨基肉桂酰氧乙基)酯(DMACEA)及其与丙烯酸的共聚物P(DMACEA co AA).用紫外吸收和荧光光谱研究了聚合物溶液的光敏感性,用傅立叶红外光谱研究了聚合物成膜后的光交联性及其过程.结果表明:DMACEA具有较好的光敏性,P(DMACEA co AA)具有较好光交联性,交联膜水溶胀和透光性也较好.展开更多
文摘The fluoro-polyester resins(F-UPR ) were synthesized from tetrafluoro- o -phthahic acid, maleic acid and propanediol in order to introduce the fluorine atom into the unsaturated polyester resin(UPR) chains and improve their properties. The result indicated that the product has viscosity 0 21 Pa·s (25 ℃), about half of that of the common unsaturated polyester resins (0 39 Pa·s, 25 ℃) and the contact angle between water and cured F-UPR was 64°. The water-resistant ability and acid-resistant ability of the resin were improved. The spectral and thermo-stability test results of the F-UPR showed that the UV-curing process of F-UPR could be completed within 40 min and the total mass loss of UV-cured F-UPR was 94 6% with thermodestruction temperature being 373 ℃.
文摘A β-diketone-bridged chromophore-containing acrylic monomer, 1-(4-dimethylaminophenyl)-4-methyl-4-pentene-1,3-diketone(DMPDK) and its saturated model compound, 1-(4-dimethyl aminophenyl)-1,3-butanedione(DMBDK) were synthesized and investigated by spectroscopy. It was found that the fluorescence intensity of DMPDK was much lower than that of DMBDK at the same concentration, which indicates that DMPDK, a β-diketone-bridged acrylic monomer having chromophore moiety, also showed fluorescence structural self-quenching effect(SSQE). Photo-induced tautomerization of DMBDK in acetonitrile was studied by means of UV and fluorescence spectroscopy. The results imply that the fluorescence method is capable of monitoring tautomerization of some fluorescent β-diketones.
文摘合成了一种新型感光性单体丙烯酸(4 N,N 二甲氨基肉桂酰氧乙基)酯(DMACEA)及其与丙烯酸的共聚物P(DMACEA co AA).用紫外吸收和荧光光谱研究了聚合物溶液的光敏感性,用傅立叶红外光谱研究了聚合物成膜后的光交联性及其过程.结果表明:DMACEA具有较好的光敏性,P(DMACEA co AA)具有较好光交联性,交联膜水溶胀和透光性也较好.
