Organic polymers with near-zero uniaxial thermal expansion coeff

Details Organic polymers with near-zero uniaxial thermal expansion coeff Organic polymers with near-zero uniaxial thermal expansion coeff

1978-12-15

1981-03-10

Hoke, V. P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

2642893, 260 4218, 260 4222, C08G 1862

Patent

active

042555353

ABSTRACT:
There are provided composites having near-zero uniaxial thermal expansion coefficients. One or more polyacetylenes having a negative uniaxial thermal expansion coefficient are uniaxially or biaxially oriented within one or more solid matrix materials having a positive thermal expansion coefficient to yield a composite material having a uniaxial thermal expansion coefficient which is nearly zero. The polyacetylenes are obtained by the solid-state polymerization of crystals of monomers containing at least one --C.tbd.C--C.tbd.C-- grouping per molecule. Also provided are processes for producing the above-described composites.

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