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-oxidation ageing of clear UP (unsaturated polyester) resins. In this paper, the chemical changes in the molocular structures of clear UP resins dtring photo-oxidation ageing are studied by FTIR spectra... swarch for methods of anti-weathering for clear UP resins.关键词:......
the temperature range of 330-370 ℃. Binary resins fi lled with acid-treated MWCNTs present similar reaction interval as neat epoxy and matrix resins, which is distinct from the material fi lled with raw MWCNTs. The alteration of the crystalline temperature and cure temperature of resins is attributed to heterogeneous nucleation of MWCNTs in matrix resins. The –COOH group of acid-treated MWCNTs reacts......
414000, China)Abstract:PS-PAMAM-IDA chelating resins were prepared by low-generations of polyamidoamine (PAMAM) and then chloroacetic acid functionalizing commercially available ammoniated polystyrene matrix, to preconcentrate Ni2+ from synthetic aqueous samples. Different generations of PAMAM were used to obtain different chelating resins, PS-IDA, PS-1.0G PAMAM-IDA and PS-2.0G PAMAM-IDA......
新型结晶聚酯树脂的合成研究及表征 王峰1,涂伟萍1,胡剑青1,熊伟1 (1.华南理工大学化学与化工学院,广州,510640) 摘要:以对笨二甲酸,己二酸,偏苯三酸酐,新戊二醇为主要原料,通过两步法合成了一种新型结晶聚酯树脂.介绍了合成工艺及原材料的选择,通过红外光谱分析,差热分析,宽角X射线衍射分析,热重分析,扫描电镜分析等测试了其结构,形态和热性能.结果表明,合成的新型结晶聚酯树脂热稳定性很高,物理性质突出. 关键词:粉末涂料; 结晶; 聚酯树脂; 合成; 表征; powder coatings; crystalloid; polyester resins; synthesis; characterization; [全文内容正在添加中] ......
液晶环氧树脂的研究概况 王汝敏1,陈立新1,蓝立文1 (1.西北工业大学化工系,西安,710072) 摘要:综述了液晶环氧树脂国内外的研究进展,介绍了液晶环氧化合物及固化剂的种类,主要性质和合成方法,并间述了液晶环氧树脂的应用前景及发展方向. 关键词:液晶环氧树脂; 固化剂; [全文内容正在添加中] ......
离子交换树脂法制备纳米La_2O_3及表征 莎木嘎1,田蒋为2,赵志宏1,娜仁图雅3,娜赫娅1 (1.内蒙古农业大学,理学院,内蒙古,呼和浩特,010018;2.山东师范大学,化学系,山东,济南,250014;3.内蒙古民族高等专科学校,内蒙古,呼和浩特,010051) 摘要:以La(NO_3)_3·6H_2O为原料,用强碱性阴离子交换树脂为沉淀剂,制备了纳米La_2O_3.前驱物及产物进行了TG-DTA,XRD,TEM,HRTEM,SAED,BET等表征.实验结果表明,前驱物是La(OH)_3 ,产物为宽约20nm~25nm,长约为80nm~200nm的板状或棒状La_2O_3纳米多晶体. 关键词:阴离子交换树脂; 纳米晶体; La_2O_3; 表征; anion exchange resins; nanocrystalline; La_2O_3......
capability of SrAl2O4:Eu2+, Dy3+ phosphor was studied. Some organic solvents and resins were selected for experimentation. The results indicate that those organic solvents will not have negative effect on the applied capability of SrAl2O4:Eu2+, Dy3+ phosphor. Adopting the organic resins and covering method, the afterglow luminance of SrAl2O4:Eu2+, Dy3+ phosphor was increased by 85.01% and 82.51......
and resin’s effect on luminescent capability of SrAl2O4:Eu2+ , Dy3+ phosphor was studied. Some organic solvents and resins were selected for experimentation. The results indicate that those organic solvents will not have negative effect on the applied capability of SrAl2O4:Eu2+ , Dy3+ phosphor. Adopting the organic resins and covering method, the afterglow luminance of SrAl2O4:Eu2+ , Dy3......
resins mixed at various stoichiometric mixture of hardener,flydust and aluminium powder under microwave energy. In this work, the curing pro-cess of thin layers of epoxy resins using microwave... a function of the percentage of hardener and fillers presence in the epoxy resins.Initially dielectric properties of epoxy resins with hardener were measured which wasdirectly correlated to the curing......