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Rapid Determination of Residual Organic Components in Organic Films

IP.com Disclosure Number: IPCOM000081871D
Original Publication Date: 1974-Aug-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Spaulding, EC: AUTHOR [+2]

Abstract

This describes a technique for defining the concentration of trace organic or organometallic compounds in thin organic films or other matrices containing such compounds. It is particularly useful for determining the degree of cure of the organic film. A Plasma-Chromatograph (P.C.) is employed to rapidly detect and define trace concentrations of certain organic/organometallic compounds, e.g., DMAC (di-methylacetimide) or DBTD (dibutyl tin dilaurate). Calibration curves subsequently developed allow a direct comparison with known cure-level standards. The general process is as follows:. 1. Weigh the sample and place in a small glass vial with ground glass joints to yield a known volume. 2. Heat sample to proper temperature and allow it to come to equilibrium. 3. Cool to room temperature. 4.

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Rapid Determination of Residual Organic Components in Organic Films

This describes a technique for defining the concentration of trace organic or organometallic compounds in thin organic films or other matrices containing such compounds. It is particularly useful for determining the degree of cure of the organic film. A Plasma-Chromatograph (P.C.) is employed to rapidly detect and define trace concentrations of certain organic/organometallic compounds, e.g., DMAC (di-methylacetimide) or DBTD (dibutyl tin dilaurate). Calibration curves subsequently developed allow a direct comparison with known cure-level standards.

The general process is as follows:.
1. Weigh the sample and place in a small

glass vial with ground glass joints to

yield a known volume.
2. Heat sample to proper temperature and

allow it to come to equilibrium.
3. Cool to room temperature.
4. Reheat to a predetermined temperature,

based on vapor pressure and the

concentration of the determinant.
5. Draw from the head space of the vial a known

quantity of vapor in a clean syringe.
6. Inject into the sample tube of the

plasma-chromatograph.
7. Record the trace; and from the trace, calculate

the area of the peak of interest.
8. Compare with known standards.

For example, a silicone-graft copolymer of a polyamide-imide dispensed from a dimethylacetimide solution is used as a protective over-coating. Its properties depend on achieving a proper degree of cure with good coverage.

The degree of curing is deter...