ChemRes
| What is it? | An extension to the MaterialUniverse data module that ranks filled and unfilled plastics for resistance to chemical and solvent environments. |
| What is in it? | Rankings for 500+ plastics in over 190 environments. |
| What is it used for? | Plastics selection applications where chemical resistance is important. |
| Where does it come from? | The data is maintained by Granta Design—much of it is based on original tests by the Rubber and Plastics Research Association (Rapra Technology Ltd). |
| How can I access it? | Within the CES Polymer Selector software—integrated with other plastics data and ideal for materials selection. Via the GRANTA MI materials information system within a plastics reference database that also includes the CAMPUS, IDES and Moldflow data. |
Description
The ChemRes module ranks filled and unfilled plastics in the MaterialUniverse data module for resistance to a remarkable array of over 190 different chemical and solvent environments—everything from nitric acid to olive oil (see list below). Rankings are based on original tests by the Rubber and Plastics Research Association (Rapra Technology Ltd).
ChemRes is recommended for engineers and designers with plastics selection applications where chemical resistance is important. Use of the data saves time and money in design with plastics. With minimal effort, it lets you screen out inappropriate materials and alerts you to potential problems or weaknesses in a design. Combined with Granta's other property data, ChemRes can form part of a powerful systematic approach to polymer selection that allows you to rapidly and reliably identify the optimal polymer to meet multiple objectives.
More information on polymer selection »
Applying ChemRes data to a materials selection project within the CES Selector software. The panel shows the first five of 190 chemical environments described within ChemRes. The user has asked the software to limit materials choice to plastics that have satisfactory resistance to Acetone. The resulting list of 275 plastics is displayed on the left of the screen.
What data is included?
Ratings
For each environment, the plastic is rated as follows:
| Rating | Meaning |
| Satisfactory | Material resists the fluid for at least 14 days at room temperature in the unstressed state. Mechanical properties are expected to be within approx. 10% of the original after removal from the fluid. |
| Probably satisfactory | Either (a) no published data was available, but the material is expected to be satisfactory in this fluid; or (b) the material is believed to perform between 'satisfactory' and 'limited'. |
| Limited | Limited resistance of material to this fluid. Limited or short-term exposure of the material to this fluid may be okay. In some cases, the material may swell moderately and reversibly. In others, the material may degrade little in the short-term, but severely over the long term. End-use testing highly recommended. |
| Doubtful | No published data exists, but the environment is expected to be unsatisfactory for the material. |
| Unsatisfactory | Does not resist the environment. This may be manifest as dissolution, extreme swelling, or chemical reaction (e.g. hydrolysis, depolymerization, or cross-linking) of the material. |
Environments
The 190 chemical environments described include:
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