The ASTM International Proficiency Testing Centre is offering a 2010 proficiency testing programme (PTP) on Thermal Analyses of Plastics (TAP) to laboratories that need a statistical quality assurance tool that will enable them to improve and maintain a high level of performance in conducting ASTM Differential Scanning Calorimetry (DSC), Oxidative-Induction Time (OIT) by Differential Scanning Calorimetry and Thermogravametric Analyses (TGA) of plastic resins.
Interlaboratory comparisons will be made so that participants can compare their test results with other laboratory results worldwide.
Test Materials and Parameters Measured
Each participating lab will receive two different polymeric resins in 5 gm quantities having a high and low melting point for each of the two test cycles conducted during the year. Resins to be evaluated in the programme include LLDPE, PP, PBT, PPS and PFA.
The following test parameters constitute the scope of the proficiency testing programme:
• ASTM D3418, standard test method for transition temperatures and enthalpies of fusion and crystallisation of polymers by DSC;
• ASTM D3850, standard test method for rapid thermal degradation of solid electrical insulating materials by the TGA method;
• ASTM D3895, standard test method for oxidative-induction time of polyolefins by DSC.
For each test trial, laboratory participants receive two sample materials along with interactive electronic data report forms and test instructions. Using the specified ASTM programme tests, participating laboratories conduct the tests of their choice that they routinely run. Upon completion of testing, each lab electronically submits its data to the ASTM PTP Centre for use in generating statistical summary reports.
Final reports, which are electronically distributed within a month of the data submission deadline, contain the following: all test results, coded to maintain PTP customer confidentiality; statistical analysis of test data; and charts plotting test results versus laboratory code.
Test results received through the programme will allow laboratories monitor their thermal analyses strengths and weaknesses in order to maintain accreditation status and compare their test results with labs around the world. Test cycles will be held in February and July. Companies must be registered by January 10, 2010, to be included in the February test trial.
To register for this new PTP, companies must visit www.astm.org/STATQA/ThermalAnalysis.htm to complete and submit a registration form.
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