A recording apparatus for the measurement of longitudinal creep | Zendy

Scherr Henry J. | Zendy; Palm William E. | Zendy

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A recording apparatus for the measurement of longitudinal creep

Author(s) -

Scherr Henry J.,

Palm William E.

Publication year - 1963

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.1963.070070408

Subject(s) - amplifier , creep , materials science , photocathode , photoelectric effect , polyvinyl chloride , transducer , voltage , composite material , viscoelasticity , optics , displacement (psychology) , polymer , acoustics , optoelectronics , electrical engineering , physics , psychology , cmos , quantum mechanics , psychotherapist , engineering , electron

A recording apparatus for measuring longitudinal creep was developed to study viscoelastic properties of polymeric films. The heart of the apparatus is a photoelectric transducer that converts specimen extension and contraction into a voltage which is then applied to a millivolt recorder through a d.c. low‐drift amplifier. As used in this apparatus, the phototube detects the variable by having its photocathode surface shadowed by a movable mask. Supplementing the recording part of the apparatus is a mechanism for controlling specimen temperature. A polymer of plasticized polyvinyl chloride was studied, to demonstrate the applicability of the apparatus. The results obtained compared favorably with the method of visually observing the displacement with a cathetometer.

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