ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Polyvinyl fluoride can be made into clear and pigmented films in thickness ranging from 0.0005 to 0.004 in. and in both biaxially oriented and essentially unoriented forms. These films are extremely long-lived outdoors and are strong, tough, flexible, and inert. Useful lives of 10 years and more in Florida exposure have been demonstrated, and it has been shown that there is a linear relation between exposure time and the logarithm of film extensibility in both natural and accelerated weathering. Biaxial orientation of PVF film results in high tensile and impact strength and great resistance to flexural fatigue. Lesser degrees of orientation result in higher tear strength, greater extensibility at higher temperatures, and decreased shrinkage at high temperatures. Both oriented and unoriented films retain a large proportion of their strength properties after 1500 hr. in steam or in 150°C. dry heat. Both are highly resistant to nonoxidizing acids, bases, and solvents. PVF films have high dielectric constants, good dielectric strength, and intermediate electrical resistivity and dissipation factor.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1960.070041009
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