General Concepts

Plueddemann, Edwin P.

doi:10.1007/978-1-4899-0342-6_1

Cited by 3 publications

References 12 publications

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Inner-Shell Excitation Spectroscopy and X-ray Photoemission Electron Microscopy of Adhesion Promoters

Tulumello¹,

Cooper²,

Koprinarov³

et al. 2005

J. Phys. Chem. B

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The C 1s, Si 2p, Si 2s, and O 1s inner-shell excitation spectra of vinyltriethoxysilane, trimethylethoxysilane, and vinyltriacetoxysilane have been recorded by electron energy loss spectroscopy under scattering conditions dominated by electric dipole transitions. The spectra are converted to absolute optical oscillator strength scales and interpreted with the aid of ab initio calculations of the inner-shell excitation spectra of model compounds. Electron energy loss spectra recorded in a transmission electron microscope on partly cured adhesion promoter, atomic force micrographs, and images and X-ray absorption spectra from X-ray photoemission electron microscopy of as-spun and cured vinyltriacetoxysilane-based adhesion promoter films on silicon are presented. The use of these measurements in assisting chemistry studies of adhesion promoters for electronics applications is discussed.

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Inner-Shell Excitation Spectroscopy and X-ray Photoemission Electron Microscopy of Adhesion Promoters

Tulumello¹,

Cooper²,

Koprinarov³

et al. 2005

J. Phys. Chem. B

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A comparison of molecular and nanodielectrics for HV insulation application

Reed

2012

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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Published work, including mechanistic studies, of molecular dielectrics, involving molecular additives, co-polymers, and miscible and immiscible polymer blends, in the 60s, 70s, and 80s, led to major improvements in breakdown and physical and mechanical properties of polymer-based insulation systems. Many new products were the result of these studies, resulting in improved designs and performance. A comparison is made beteeen these molecular dielectric materials, and new nanodielectrics, to assess each of their advantages and disadvantages. Based on this comparison, potential avenues for improvement of nanodielectrics are identified.

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Glass Fiber Reinforced Polypropylene Mechanical Properties Enhancement by Adhesion Improvement

2012

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Glass fibers (GF) are the reinforcement agent most used in polypropylene (PP) based composites, as they have good balance between properties and costs. However, their final properties are mainly determined by the strength and stability of the polymer-fiber interphase. Fibers do not act as an effective reinforcing material when the adhesion is weak. Also, the adhesion between phases can be easily degraded in aggressive environmental conditions such as high temperatures and/or elevated moisture, and by the stress fields to which the material may be exposed. Many efforts have been done to improve polymer-glass fiber adhesion by compatibility enhancement. The most used techniques include modifications in glass surface, polymer matrix and/or both. However, the results obtained do not show a good costs/properties improvement relationship. The aim of this work is to perform an accurate analysis regarding methods for GF/PP adhesion improvement and to propose a new route based on PP in-situ polymerization onto fibers. This route involves the modification of fibers with an aluminum alkyl and hydroxy-α-olefin and from there to enable the growth of the PP chains using direct metallocenic copolymerization. The adhesion improvements were further proved by fragmentation test, as well as by mechanical properties measurements. The strength and toughness increases three times and the interfacial strength duplicates in PP/GF composites prepared with in-situ polymerized fibers.

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General Concepts

Cited by 3 publications

References 12 publications

Inner-Shell Excitation Spectroscopy and X-ray Photoemission Electron Microscopy of Adhesion Promoters

Inner-Shell Excitation Spectroscopy and X-ray Photoemission Electron Microscopy of Adhesion Promoters

A comparison of molecular and nanodielectrics for HV insulation application

Glass Fiber Reinforced Polypropylene Mechanical Properties Enhancement by Adhesion Improvement

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