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XPS and DSC Studies of Solution Cast Polystyrene/Poly(organophosphazene) Blends. I. Polystyrene/Poly(phenoxy)phosphazene (2000)

Gleria, Mario ; Minto, Francesco ; Braglia, Roberto ; [et al.]

Springer

Journal of inorganic and organometallic polymers and materials 10 (2000), S. 23-38

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ISSN: 1572-8870

Keywords: polyphosphazene ; polystyrene ; blends ; X-ray photoelectron spectroscopy

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Blends of polystyrene (PS) with poly(phenoxy)phosphazene (PPN) were studied by differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS). A third component, poly(2,6-dimethyl-1,4-phenylene ether) (PPE), was added with the aim of increasing compatibility of the blends. T g values did not vary in the PS/PPN blends, indicating that the components are substantially incompatible. The addition of PPE did not change the situation much even though some compatibility between PPN and PPE was detected. XPS on the cast films showed that only PPN was present at the surface. The surface composition of the blends was found to be dependent on the preparation technique.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1009452331855

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Impact behaviour and morphology of rubber-modified epoxy resins (1991)

Pucciariello, Rachele ; Villani, Vincenzo ; Bianchi, Nadia ; [et al.]

Weinheim : Wiley-Blackwell

Angewandte Makromolekulare Chemie 187 (1991), S. 75-86

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ISSN: 0003-3146

Keywords: Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Description / Table of Contents: Das Hochgeschwindigkeits-Schlagverhalten von Kautschuk-modifizierten Epoxidharzen wurde untersucht. Die Zähigkeit der verschiedenen Epoxid-Kautschuk-Systeme wurde anhand von Schlag-Zug-Versuchen ermittelt. Die Bruchflächen wurden raster-elektronenmikroskopisch bewertet. Die Kombination eines festen Fluor-Kautschuks mit einem allgemein verwendeten, carboxyterminierten Butadien-Acrylnitril-Kautschuk erwies sich als sehr effektiv.Es wurde versucht, zwischen dem beobachteten Bruchverhalten und der transmissionselektronenmikroskopisch bestimmten Morphologie eine Korrelation herzuleiten.

Notes: In the present work the impact behaviour at high speed of rubber-modified epoxy resins has been investigated. Impact-tension measurements have been performed to evaluate the toughness of different systems. A detailed post-failure observation of the fracture surfaces has been made through scanning electron microscopy (SEM). A combination of a solid fluorinated rubber with the generally used carboxy-terminated butadiene-acrylonitrile rubber (CTBN) was found to be very effective.A correlation was tempted between the observed fracture behaviour and the bulk morphology, examined by transmission electron microscopy (TEM).

Additional Material: 8 Ill.