The sward number and mechanical properties of plastics | Zendy

Roberts J. | Zendy; Steel M. A. | Zendy

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The sward number and mechanical properties of plastics

Author(s) -

Roberts J.,

Steel M. A.

Publication year - 1966

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1966.070100912

Subject(s) - natural rubber , composite material , materials science , polyethylene , modulus , poisson's ratio , young's modulus , loss factor , poisson distribution , mathematics , statistics , optoelectronics , dielectric

A Sward rocker tester is used to obtain the Sward number for glass, mild steel, copper, poly(methyl methacrylate), polyethylene of various densities, and natural rubber. A relationship between the number and mechnical properties is investigated. It is shown that with metals and glass the number is essentially a frictional factor. With plastics and rubber it is a true hardness factor, involving dynamic Young's modulus, Poisson's ratio, and damping capacity. The aim of the investigation is to encourage the development of the Sward test as a nondestructive quality test for plastics.

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