Melt Flow Rate Testing—Part 6

摘要

While last month's article was being written, tests were being run on two sets of polycarbonate parts. The results demonstrated exactly the situation that we outlined in that article. Both the "good" and "bad" parts exhibited an excessive increase in melt flow rate (MFR) that is typically an indicator of polymer degradation. The "good" parts were judged to be good because they had performed well in the application. The "bad" parts showed obvious cracking that alerted the end user to the problem.