This paper puts forward the two methods of weightlessness and alkoxyl group content determination to calculate the amount of cross-linking agent after elaborating the curing essence of silicone paint under the action ...This paper puts forward the two methods of weightlessness and alkoxyl group content determination to calculate the amount of cross-linking agent after elaborating the curing essence of silicone paint under the action of catalysis , and provides the theoretical basis of fixing the amoount of cross-linking agent accurately and quantitatively. At the same time, the structure of coating film is studied by the use of photoelectronic spectromenter and some other modern technology, and verified in theory. At last, this paper analyses the layer structure and the relationship between it and the coating properties.展开更多
Phenolic resin(PF) and nano-SiO2 were used to improve the curing property and high humidity resistance of epoxy resin (EP) and methyl nadic anhydride (MNA) resistor paint, respectively. Hydrogen bonds, formed between ...Phenolic resin(PF) and nano-SiO2 were used to improve the curing property and high humidity resistance of epoxy resin (EP) and methyl nadic anhydride (MNA) resistor paint, respectively. Hydrogen bonds, formed between phenolic resin and nano-SiO2 in alcohol, made nano-SiO2 disperse easily in EP/MNA paint through phenolic resin without being treated by supersonic vibration. When the mass ratio of PF to EP in paint is 3:7, the formed composite paint film can be cured in 2 min at 170 ℃ . When the mass ratio of nano-SiO2 to PF in paint is 3:100, the property of high humidity resistance of the composite paint is the best, meeting the requirement of varying ratio of resistance less than 0.1% after experiment on high humidity resistance. SEM analysis shows the surface of the composite paint film is smooth, glassy, tight and homogeneous, without acicular air holes.展开更多
为准确测量木家具表面漆膜涂层中可溶性铅含量,分析了影响测量结果的各种不确定度来源,包括样品重复测量引起的不确定度、标准样品纯度引入的不确定度、电子天平称量引起的不确定度、铅标准溶液配制中定容及移液体积引入的不确定度、火...为准确测量木家具表面漆膜涂层中可溶性铅含量,分析了影响测量结果的各种不确定度来源,包括样品重复测量引起的不确定度、标准样品纯度引入的不确定度、电子天平称量引起的不确定度、铅标准溶液配制中定容及移液体积引入的不确定度、火焰原子吸收光谱仪示值变化引起的不确定度、通过计算出各标准不确定度分量,计算出了合成标准不确定度及扩展不确定度。最终得出本实验室采用的德国耶拿Nov AA 800F火焰法原子吸收光谱仪测量的木家具漆膜可溶性铅含量测量结果为X=31.427 mg/kg±0.926 mg/kg,k=2。展开更多
文摘This paper puts forward the two methods of weightlessness and alkoxyl group content determination to calculate the amount of cross-linking agent after elaborating the curing essence of silicone paint under the action of catalysis , and provides the theoretical basis of fixing the amoount of cross-linking agent accurately and quantitatively. At the same time, the structure of coating film is studied by the use of photoelectronic spectromenter and some other modern technology, and verified in theory. At last, this paper analyses the layer structure and the relationship between it and the coating properties.
文摘为了提高丙烯酸树脂的耐水性、附着力以及耐溶剂性,以桐油酸和环氧树脂E-44为原料制备环氧酯,采用溶液聚合和自乳化工艺合成了环氧酯改性水性丙烯酸树脂,并引入氰特CY325氨基树脂制备双组分环氧酯改性水性丙烯酸树脂漆膜。利用FT-IR、1 H NMR、粒径测试等对环氧酯单体、环氧酯改性水性丙烯酸树脂的结构和性能进行表征和分析,并测试了单组分和双组分环氧酯改性水性丙烯酸树脂漆膜的硬度、光泽、吸水率、水接触角、耐溶剂性等性能。结果表明:当环氧酯用量为35%时,单/双组分漆膜综合性能达到最佳,双组分漆膜光泽(60°)达102.3,耐溶剂擦拭次数为500次,耐水性可达480 h,附着力为0级,铅笔硬度为4H,耐冲击性为50 cm。
基金Supported by Science and Technology Committee of Tianjin(No06YFGPGX08400)
文摘Phenolic resin(PF) and nano-SiO2 were used to improve the curing property and high humidity resistance of epoxy resin (EP) and methyl nadic anhydride (MNA) resistor paint, respectively. Hydrogen bonds, formed between phenolic resin and nano-SiO2 in alcohol, made nano-SiO2 disperse easily in EP/MNA paint through phenolic resin without being treated by supersonic vibration. When the mass ratio of PF to EP in paint is 3:7, the formed composite paint film can be cured in 2 min at 170 ℃ . When the mass ratio of nano-SiO2 to PF in paint is 3:100, the property of high humidity resistance of the composite paint is the best, meeting the requirement of varying ratio of resistance less than 0.1% after experiment on high humidity resistance. SEM analysis shows the surface of the composite paint film is smooth, glassy, tight and homogeneous, without acicular air holes.
文摘为准确测量木家具表面漆膜涂层中可溶性铅含量,分析了影响测量结果的各种不确定度来源,包括样品重复测量引起的不确定度、标准样品纯度引入的不确定度、电子天平称量引起的不确定度、铅标准溶液配制中定容及移液体积引入的不确定度、火焰原子吸收光谱仪示值变化引起的不确定度、通过计算出各标准不确定度分量,计算出了合成标准不确定度及扩展不确定度。最终得出本实验室采用的德国耶拿Nov AA 800F火焰法原子吸收光谱仪测量的木家具漆膜可溶性铅含量测量结果为X=31.427 mg/kg±0.926 mg/kg,k=2。
