BS 2782-7 discusses Method 732F for the determination of rheological properties of methyl methacrylate polymers.
BS 2782-7: Method 732F specifies the conditions to be used for the determination of the viscosity number of methyl methacrylate polymer moulding and extrusion materials in dilute solution.
BS 2782-7: Method 732F applies to methyl methacrylate (MMA) homopolymers and copolymers, and mixtures of the two with a minimum of 80 % (m/m) of MMA and up to 20 % (m/m) of other monomers, with and without additives, as defined in ISO 8257-1.
BS 2782-7: Method 732F on the viscosity number of MMA polymers is relevant to:
The properties of materials that govern the specific way in which these deformation or flow behaviours occur are called rheological properties. Methyl methacrylate is used in the manufacture of resins and plastics. It is essential that these materials be tested for properties such elasticity, rigidity, viscosity and bulkiness, to ensure they meet the performance requirements of the end-product application.
In this regard, BS 2782-7: Method 940B provides the best industry guidance on procedures for determination of viscosity number of methyl methacrylate polymers.
As a result, testing in compliance with BS 2782-7: Method 732F can demonstrate whether the MMA polymers are fit for purpose, and exhibit the properties essential to the end-use product or application.
ISO 1628-6:1990