Chemical Resistance And Solvent Resistance
Oct 16, 2018

Polymethyl methacrylate is resistant to relatively dilute 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, fat-resistant hydrocarbons, insoluble in water, methanol, glycerin, etc., but can absorb alcohol to swell, and produce 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.

Polymethyl methacrylate has good resistance to gases such as ozone and sulfur dioxide.

Weather resistance: Polymethyl methacrylate has excellent weathering resistance. The sample has been subjected to natural aging test for 4 years. The weight change, tensile strength and light transmittance are slightly decreased, and the color is slightly yellowish and resistant to silver. The decline in sex is more obvious, the impact strength is slightly improved, and other physical properties are almost unchanged.

Flammability: Polymethyl methacrylate is easily burned with a limiting oxygen index of only 17.3.


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