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Carbon nanotube/polymer composites resistant to ionizing radiation

a technology of carbon nanotubes and composites, applied in the field of polymer composites, can solve the problems of prone to many types of radiation exposure, and achieve the effect of improving the polymer resistance to ionizing radiation

Inactive Publication Date: 2006-03-16
HARMON JULIE P +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] It is a further object of the present invention to provide methods for improving polymer resistance to ionizing radiation.

Problems solved by technology

These items, previously constructed from inferior and undesirable materials, can be prone to many types of radiation exposure.

Method used

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  • Carbon nanotube/polymer composites resistant to ionizing radiation
  • Carbon nanotube/polymer composites resistant to ionizing radiation
  • Carbon nanotube/polymer composites resistant to ionizing radiation

Examples

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example 1

[0022] Polymethylmethacrylate is synthesized via addition polymerization. The viscosity average molecular weight (Mv) is obtained via dilute solution viscometry following previously established procedures (Collins, E. et al., Experiments in Polymer Chemistry (1973)). Mv was determined to be 234K using the Mark Houwink parameters, K=3.4×103 and a=0.83.

PMMA / SWNT Composite Synthesis

[0023] The following is a general procedure for preparing a composite containing 0.26 wt % SWNT in PMMA. The single wall carbon nanotubes are dispersed in dimethyl formamide DMF for two hours using a Branson Sonifier 450. The PMMA is then added to the solution. This heterogeneous mixture is then sonicated for an additional two hours. The PMMA / SWNT mixture is then precipitated out of the solution with methanol. The PMMA / SWNT composite is then dried in an oven at 110° C. for two days. To ensure that the composite is thoroughly mixed, the product is folded and fractured. The pieces are stacked between two po...

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Abstract

Polymer composites directed to single wall carbon nanotubes (SWNT) dispersed within poly(methyl methacrylate) (PMMA) and their methods of synthesis. Composites of the present invention are also formulated as films and spun coat onto desired substrates. Advantageously, both the composites and films of the present invention exhibit resistance to radiation.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is a continuation of U.S. application Ser. No. 10 / 305,532, filed Nov. 27, 2002, which claims the benefit of U.S. Provisional Application Ser. No. 60 / 334,158, filed Nov. 29, 2001, which are hereby incorporated in their entirety by reference.FIELD OF INVENTION [0002] The subject invention pertains to the field of polymer composites, more particularly to the use of carbon nanotubes therein. BACKGROUND OF THE INVENTION [0003] Since the discovery of carbon nanotubes in 1991, interest has focused on exploiting their novel electronic and mechanical properties on a macroscopic scale in polymer composites (Iijima, S., Nature (1991)). For example, nonlinear optical (NLO) properties of nanotube composites have applications in optical sensor technology (Jin, Z. et al., Chem. Phys. Lettrs. (2000)). Nanotubes are also of great interest in electromagnetic (EMI) shielding applications and in the design and development of nanoscale elect...

Claims

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Application Information

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IPC IPC(8): C07C1/00B06B1/02H05B6/00
CPCB82Y10/00B82Y30/00C08L33/12C08J5/005C08J2333/12C08J3/2053
Inventor HARMON, JULIE P.MUISENER, PATRICIA ANNE O.CLAYTON, LANETRA M.D'ANGELO, JOHN
Owner HARMON JULIE P