ISSN:
0449-2951
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A method and apparatus have been developed specifically for the determination of the dynamic tensile modulus of thin polymeric films. A weight is attached to a 2 × 60-mm. strip of film, the upper end of which is clamped to a phonograph recording head. The recording head is used to set the system into either longitudinal or transverse vibration. The cross-sectional area of the film is determined in place from the length, the density, and the transverse resonant frequency (the Vibroscope principle). The modulus is found from the dimensions of the specimen and the longitudinal resonant frequency. The apparatus has been used to study the moduli of a series of polymeric packaging films, the dependence of the modulus of polyethylene film on the angle between the long axis of the specimen and the machine direction, the gage dependence of the stiffness of polyolefin films, and the relationship between the modulus and the moisture and glycerol contents of cellophane.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1963.100010511
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