Most motor oils are made from mineral oils derived from petroleum, the reserves of which are limited and exhaustible. The aim of this study is to produce and characterize motor oil formulations based on mixtures of ru...Most motor oils are made from mineral oils derived from petroleum, the reserves of which are limited and exhaustible. The aim of this study is to produce and characterize motor oil formulations based on mixtures of rubber latex cup bottom oil (RLCBO) and used frying oil (UFO). The results show that these formulations have a density between 0.91 and 0.92. These densities evolve linearly with the proportion of cup bottom oil and temperature. Similarly, the kinematic viscosity of the blends follows an exponential relationship with temperature. By plotting the logarithm of these kinematic viscosities against the inverse of the temperature, we were able to determine the activation energy of the various blends and deduce that the formulations behave Newtonian.展开更多
Natural rubber latex （NRL） and methyl methacrylate （MMA） grafted rubber latex were blended in different ratios and irradiated at various absorbed doses by gamma rays from Co-60 source at room temperature. The tens...Natural rubber latex （NRL） and methyl methacrylate （MMA） grafted rubber latex were blended in different ratios and irradiated at various absorbed doses by gamma rays from Co-60 source at room temperature. The tensile properties, swelling ratio and permanent set were measured. The maximum tensile strength and modulus at 500% elongation were obtained at an absorbed dose of 8 kGy. Modulus increases from 6.99 MPa to 9.87 MPa for an increase in proportion of MMA grafted rubber from 40% to 60% in the blend at similar absorbed dose. Elongation at break and swelling ratio decrease with increasing absorbed dose as well as the MMA grafted rubber content in the blends. The decreasing trend of permanent set is high up to 5 kGy absorbed dose, and beyond that dose, it becomes almost flat.展开更多
利用AFM轻敲模式(tapp ing mode)下的相位成像技术,对PMMA/PBA核壳乳胶及具有相同聚合物组分的共混乳胶成膜后的涂膜形貌进行了比较研究,发现核壳乳胶成膜后,由PMMA组成的硬核呈岛状均匀分布于由PBA组成的软壳融合后形成的连续相中,而...利用AFM轻敲模式(tapp ing mode)下的相位成像技术,对PMMA/PBA核壳乳胶及具有相同聚合物组分的共混乳胶成膜后的涂膜形貌进行了比较研究,发现核壳乳胶成膜后,由PMMA组成的硬核呈岛状均匀分布于由PBA组成的软壳融合后形成的连续相中,而对于共混乳胶,由于乳胶粒子间容易发生聚结,其成膜后PMMA乳胶粒子未能均匀分散形成海岛结构。不同粒子形态的乳胶其涂膜的透光性、摆杆硬度等也存在着明显差别。展开更多
文摘Most motor oils are made from mineral oils derived from petroleum, the reserves of which are limited and exhaustible. The aim of this study is to produce and characterize motor oil formulations based on mixtures of rubber latex cup bottom oil (RLCBO) and used frying oil (UFO). The results show that these formulations have a density between 0.91 and 0.92. These densities evolve linearly with the proportion of cup bottom oil and temperature. Similarly, the kinematic viscosity of the blends follows an exponential relationship with temperature. By plotting the logarithm of these kinematic viscosities against the inverse of the temperature, we were able to determine the activation energy of the various blends and deduce that the formulations behave Newtonian.
文摘Natural rubber latex （NRL） and methyl methacrylate （MMA） grafted rubber latex were blended in different ratios and irradiated at various absorbed doses by gamma rays from Co-60 source at room temperature. The tensile properties, swelling ratio and permanent set were measured. The maximum tensile strength and modulus at 500% elongation were obtained at an absorbed dose of 8 kGy. Modulus increases from 6.99 MPa to 9.87 MPa for an increase in proportion of MMA grafted rubber from 40% to 60% in the blend at similar absorbed dose. Elongation at break and swelling ratio decrease with increasing absorbed dose as well as the MMA grafted rubber content in the blends. The decreasing trend of permanent set is high up to 5 kGy absorbed dose, and beyond that dose, it becomes almost flat.
文摘利用AFM轻敲模式(tapp ing mode)下的相位成像技术,对PMMA/PBA核壳乳胶及具有相同聚合物组分的共混乳胶成膜后的涂膜形貌进行了比较研究,发现核壳乳胶成膜后,由PMMA组成的硬核呈岛状均匀分布于由PBA组成的软壳融合后形成的连续相中,而对于共混乳胶,由于乳胶粒子间容易发生聚结,其成膜后PMMA乳胶粒子未能均匀分散形成海岛结构。不同粒子形态的乳胶其涂膜的透光性、摆杆硬度等也存在着明显差别。
