The Polymers Division hosted the Workshop on Micromechanics Measurement Technologies for Fiber-Polymer Interfaces, jointly sponsored by NIST and the Textile Research Institute of Princeton, NJ, on May 28-30, 1997. Fifty researchers from industry, academia, and government laboratories attended the workshop to define the current status of measurement technology, demonstrate new automated instrumentation, and identify the critical needs and opportunities for future research. The importance of the fiber-polymer interface for composite performance has inspired considerable research during the last decade on test method development to assess interfacial micro-mechanical properties. Although a number of tests have been developed, they all require many assumptions, and comparisons of test results from different laboratories have yielded little or no agreement.The most important need identified by the 15 attendees from industry was development of relationships between micro-mechanical testing and the performance of full-scale composites. This need was mentioned in several of the presentations and discussed in all of the discussion groups. Composite manufacturers would like to use databases of micro-mechanical test data on standard composite systems to design a broad array of composite products, and to minimize the expensive full scale testing currently required. However, to develop such databases, test methods must be reliable and standardized. Discussions of prior inter-laboratory comparisons of test methods revealed that a contributing factor to variability in results came from differences in the sample preparation method. Thus, a standard method of sample preparation was identified as a key need. This led to a suggestion that micro-Raman spectroscopy be used as a quality control tool during an upcoming VAMAS-sponsored round robin testing program, and a call for standardized sample preparation and testing protocols.
Citation: NIST Interagency/Internal Report (NISTIR) - 6102Report Number:
NIST Pub Series: NIST Interagency/Internal Report (NISTIR)
Pub Type: NIST Pubs
fragmentation, indentation, interface, polymeric composites, pull-out, Raman spectroscopy, test methods