Stress cracking chemicals include detergents, surfactants, lubricants, oils, ultra-pure water and plating additives such as brighteners and wetting agents. A combination of three factors cause stress cracking: tensile stress, a stress cracking chemical and the inherent susceptibility of a thermoplastic to stress cracking. Environmental stress cracking is not purely a result of chemical attack. Stress CrackingCertain combinations of chemical exposure and mechanical stress can also cause environmental stress cracking. These include exposure time, chemical impurities, mixing of different chemicals, concentration, extreme temperatures or pressures, temperature and pressure cycling and mechanical stresses. This is because so many factors can affect a materials chemical resistance. Why lab testing is not enoughIn a lab, it is not possible to cover all the possible variables that might exist in actual operating conditions. Also, immersion test procedures are not generally standardized. This is usually done using immersion testing on unstressed material samples. Things to keep in mind when referring to this chemical compatibility guideChemical resistance information is based on data provided by testing done under laboratory conditions. Have your parts tested and inspected by the experts at ISM.Īcrylic (PMMA) plastic and these chemical compatibility guidelines Make sure your components are operational before they enter the field. Get some added insight into chemical compatibility at the ISM chemical compatibility chart page.Īcrylics are generally not recommended for use with Īcrylic (PMMA) chemical resistanceIn general, acrylics are unaffected by laboratory chemical solutions where water is the solvent. Because it is BPA free, it is also a useful BPA-free alternative to polycarbonate frequently used for making component parts for medical, biological and biopharmaceutical applications. Learn more details about the properties of acrylic (PMMA) plastic at Polymethyl methacrylate Properties and Their Valuesby SpecialChem.ĭownload the complete Acrylic Chemical Compatibility Chart>Īcrylic (PMMA) biocompatibility PMMA is very biocompatible with human tissue. Excellent resistance to UV (ultraviolet) light.

It does not yellow over time.īrowse the Acrylic Chemical Compatibility Chart Below >ĭownload the complete Acrylic Chemical Compatibility Chart PDF >

Acrylic plastic also has excellent resistance to ultraviolet (UV) light and weathering. It is especially attractive for its high, optical quality transparency and useful mechanical properties. It is best known by its trade names Lucite® and Plexiglas®.Īcrylic is tough, durable, easy to shape and relatively inexpensive. What is acrylic plastic?Acrylic (PMMA, polymethyl methacrylate) is a widely used amorphous thermoplastic polymer.

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