Organic polymers with near-zero uniaxial thermal expansion coefficients
US4255535A · kind A · utility
1Cited by
7References
2Claims
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Key dates
| Filing date | Dec 15, 1978 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Dec 15, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F38/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.