Photopolymerization process of glycerin triglycidyl ether based systems was studied by an FT-IR spectrometer.An increase in the rate of polymerization for glycerin triglycidyl ether was evident when 3,4-epoxycyclohexy...Photopolymerization process of glycerin triglycidyl ether based systems was studied by an FT-IR spectrometer.An increase in the rate of polymerization for glycerin triglycidyl ether was evident when 3,4-epoxycyclohexylmethyl-3＇,4＇-epoxycyclohexanecarboxylate was added to it.Its copolymerization mechanism was confirmed by using DSC analysis.The effect of ethoxylated trimethyol propane triacrylate on the rate of polymerization for glycerin triglycidyl ether was also studied,and the formation of interpenetrating network tightly cross-link was proposed.展开更多
To improve the physiochemical properties of gellan gum（GG）, GG was modified with acrylamide and trimethylolpropane triglycidyl ether（TTE）. The structure and morphology of modified GG were characterized by Fourier ...To improve the physiochemical properties of gellan gum（GG）, GG was modified with acrylamide and trimethylolpropane triglycidyl ether（TTE）. The structure and morphology of modified GG were characterized by Fourier transform infrared（FT-IR） spectroscopy, X-ray diffraction（XRD）, differential scanning calorimetry（DSC） and scanning electron microscopy（SEM）. The characteristic peaks at 3448, 2788, 1654, 1411, 1117 and 1044 cm-1）in the FT-IR spectrum confirm the modification. The XRD and DSC data revealed that the modification enhanced the thermal stability of GG. SEM analysis suggested the modification introduced a porous microstructure, resulting in the adsorption of crystal violet. In addition, the adsorption capacity, thermal stability and swelling property of GGTTE3 were superior to GGTTE1, GGTTE2, GGTTE4 and GGTTE5.展开更多
以四氯化硅和三环氧丙基异氰尿酸酯(泰必克,TGIC)为起始原料,首先进行环氧乙烷开环反应,再与环氧丙烷反应生成伞状硅、氯、氮三元素协同高效阻燃剂三嗪三硅酸氯丙酯。探讨反应的物质的量比,反应时间及温度等对产品收率的影响。最佳工艺...以四氯化硅和三环氧丙基异氰尿酸酯(泰必克,TGIC)为起始原料,首先进行环氧乙烷开环反应,再与环氧丙烷反应生成伞状硅、氯、氮三元素协同高效阻燃剂三嗪三硅酸氯丙酯。探讨反应的物质的量比,反应时间及温度等对产品收率的影响。最佳工艺条件:n(泰必克)∶n(四氯化硅)∶n(环氧丙烷)为1∶3∶10;泰必克与四氯化硅在60℃反应5h,再加入环氧丙烷于55℃反应6h,产率为97.5%。采用FT IR、1 H NMR、极限氧指数等技术表征化合物三嗪三硅酸氯丙酯的分子结构及阻燃性能。展开更多
A new nitrogen-containing epoxy resin (XT resin) was synthesized from chain extension of xylenephenolformaldehyde resin (XPF) and triglycidyl isocyanurate (TGIC) in the presence of base catalyst. FT-IR and H-NMR ana...A new nitrogen-containing epoxy resin (XT resin) was synthesized from chain extension of xylenephenolformaldehyde resin (XPF) and triglycidyl isocyanurate (TGIC) in the presence of base catalyst. FT-IR and H-NMR analysis confirmed the chemical structure of XT resin. It was 1 cured with dicyandiamide (DICY) and diaminodiphenyl sulfone (DDS). Dynamic mechanical analysis (DMA) results showed that the introduction of triazine ring provides epoxy polymer with good thermal stability. Furthermore, high char yields at 800℃ in thermogravimetric (TGA) analysis indicated that XT resin had potential flame retardance.展开更多
基金Funded by the Innovatory Group Program of the Natural Science Foundation of Hubei Province (2004ABC001)the National "863" Hi-tech Foundation of China (2002AA6Z3083)
文摘Photopolymerization process of glycerin triglycidyl ether based systems was studied by an FT-IR spectrometer.An increase in the rate of polymerization for glycerin triglycidyl ether was evident when 3,4-epoxycyclohexylmethyl-3＇,4＇-epoxycyclohexanecarboxylate was added to it.Its copolymerization mechanism was confirmed by using DSC analysis.The effect of ethoxylated trimethyol propane triacrylate on the rate of polymerization for glycerin triglycidyl ether was also studied,and the formation of interpenetrating network tightly cross-link was proposed.
基金financially supported by the International Science and Technology Cooperation and Exchange Program of Fujian Agriculture and Forestry University(KXGH17001)
文摘To improve the physiochemical properties of gellan gum（GG）, GG was modified with acrylamide and trimethylolpropane triglycidyl ether（TTE）. The structure and morphology of modified GG were characterized by Fourier transform infrared（FT-IR） spectroscopy, X-ray diffraction（XRD）, differential scanning calorimetry（DSC） and scanning electron microscopy（SEM）. The characteristic peaks at 3448, 2788, 1654, 1411, 1117 and 1044 cm-1）in the FT-IR spectrum confirm the modification. The XRD and DSC data revealed that the modification enhanced the thermal stability of GG. SEM analysis suggested the modification introduced a porous microstructure, resulting in the adsorption of crystal violet. In addition, the adsorption capacity, thermal stability and swelling property of GGTTE3 were superior to GGTTE1, GGTTE2, GGTTE4 and GGTTE5.
文摘以四氯化硅和三环氧丙基异氰尿酸酯(泰必克,TGIC)为起始原料,首先进行环氧乙烷开环反应,再与环氧丙烷反应生成伞状硅、氯、氮三元素协同高效阻燃剂三嗪三硅酸氯丙酯。探讨反应的物质的量比,反应时间及温度等对产品收率的影响。最佳工艺条件:n(泰必克)∶n(四氯化硅)∶n(环氧丙烷)为1∶3∶10;泰必克与四氯化硅在60℃反应5h,再加入环氧丙烷于55℃反应6h,产率为97.5%。采用FT IR、1 H NMR、极限氧指数等技术表征化合物三嗪三硅酸氯丙酯的分子结构及阻燃性能。
文摘A new nitrogen-containing epoxy resin (XT resin) was synthesized from chain extension of xylenephenolformaldehyde resin (XPF) and triglycidyl isocyanurate (TGIC) in the presence of base catalyst. FT-IR and H-NMR analysis confirmed the chemical structure of XT resin. It was 1 cured with dicyandiamide (DICY) and diaminodiphenyl sulfone (DDS). Dynamic mechanical analysis (DMA) results showed that the introduction of triazine ring provides epoxy polymer with good thermal stability. Furthermore, high char yields at 800℃ in thermogravimetric (TGA) analysis indicated that XT resin had potential flame retardance.
