Chemical resistance and solvent resistance Polymethyl m […]
Chemical resistance and solvent resistance
Polymethyl methacrylate can withstand relatively rare inorganic acids, but concentrated inorganic acids can erode it and can be resistant to alkalis, but warm sodium hydroxide and potassium hydroxide can etch it and can withstand salt. And oils, oil-resistant hydrocarbons, insoluble in water, methanol, glycerin, etc., but can absorb alcohol swelling, and cause stress cracking, not resistant to ketones, chlorinated hydrocarbons and aromatic hydrocarbons. Its solubility parameter is about 18.8 (J / CM3) 1/2, soluble in many chlorinated hydrocarbons and aromatic hydrocarbons, such as dichloroethane, trichloroethylene, chloroform, toluene, etc., vinyl acetate and acetone can also make it Dissolved.