New Standard from Last Update.

1. SCOPE

1.1 This Standard prescribes the designation system, requirements, methods of sampling and test for Polymethyl methacrylate (PMMA) thermoplastic material.

1.2 The types of PMMA plastic are differentiated by a classification system based on appropriate levels of the designatory property like vicat softening temperature, melt mass-flow rate, viscosity number (optional) and on information about the intended application and/or method of processing, important properties, additives and colourants.

1.3 This standard is applicable to all poly(methyl methacrylate) homopolymers and to copolymers of methyl methacrylate (MMA) containing at least a mass percentage of 80 percent of MMA and not more than a mass percentage of 20 percent of acrylic esters or other monomers.

1.4 This standard applies to materials ready for normal use in the form of beads, granules and pellets and to materials unmodified or modified by colourants, additives, etc. It does not apply to PMMA modified with elastomers.

1.5 This standard is not intended to imply that materials having the same designation give necessarily the same performance. This standard does not provide engineering data, performance data or data on processing conditions which might be required to specify a material for a particular application and/or method of processing. If such additional properties are required, they are, if suitable, determined using the test methods specified in IS 17928 (Part 2).

1.6 In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements can be given in data block 5.