BS IS0 6721-9:2019 Bsl Standards Publication Plastics Determination of dynamic mechanical properties Part 9: Tensile vibration - Sonic-pulse propagation method bsi. BSISO6721-9:2019 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 6721-9:2019. It supersedes BS IS0 6721-9:1997+A1:2007, which is withdrawn. The UKparticipation inits preparation was entrustedto Technical CommitteePRI/21,Testingofplastics. A listoforganizationsrepresented onthis committee can be obtained on requestto its secretary. This publication does not purportto include all the necessary provisions ofa contract.Users areresponsiblefor its correctapplication. @TheBritishStandards Institution2019 PublishedbyBSIStandardsLimited2019 ISBN9780580522772 ICS83.080.01 Compliance with aBritish Standard cannot conferimmunityfrom legal obligations. This British Standard was published under the authority of the Standards Policyand Strategy Committeeon30April2019. Amendments/corrigenda issued sincepublication Date Text affected BS IS0 6721-9:2019 ISO INTERNATIONAL STANDARD 6721-9 Second edition 2019-04-30 Plastics Determination of dynamic mechanical properties - Part 9: Tensile vibration Sonic-pulse propagation method Plastiques-Determination des proprietesmecaniques dynamiques- Partie 9: Vibration en traction - Methode de propagation de signaux acoustiques Reference number IS0 6721-9:2019(E) ISO @IS02019