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Significance and Use
This test method is suitable for manufacturing control, development, and research studies.
1.1 This test method covers the determination of long polystyrene blocks in SBR rubbers and styrene-reinforced latices.
1.2 Percent block styrene content may be determined in the range from 1 to 100 %.
1.3 This test method is intended for use on gel-free polymers, but it may be used on polymers containing gel, if it has been proven that gel does not interfere.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1076 Specification for Rubber--Concentrated, Ammonia Preserved, Creamed, and Centrifuged Natural Latex
D1416 Test Methods for Rubber from Synthetic Sources--Chemical Analysis
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
ICS Number Code 83.040.10 (Latex and raw rubber); 83.060 (Rubber)
UNSPSC Code 13101705(Styrene butadiene SBR)