Composite microfibrillar reinforced

On the basis of the above considerations, one can conclude that by following the approach described a new type of composites - microfibrillar reinforced ones can be obtained from all thermoplastic polymers. Using blends of condensation polymers, a strong self-compatibillzing effect can be achieved due to Interfaclal chemical interactions. Opportunities are also available for continuous controllable changes of the chemical composition and crystallization ability of the matrix. The formation of an interphase drastically Improves the mechanical integrity of drawn blends. 

The principle procedure follows the well known concept of microfibrillar composites (MFCs) [3]. In contrast to the classical composites, microfibrillar reinforced composites... 

A new type of composite material starting from polymer blends has been developed. Due to the fact that the reinforcing elements are the basic morphological entities of oriented polymers, the microfibrils, these new composites have been named microfibrillar-reinforced composites (MFC) (Evstatiev Fakirov, 1992). MFC, however, clearly differ from traditional composite systems. Since the microfibrils are not available as a separate component, the classical approach to composite preparation is inappropriate for MFC mannfactnring. 

Covas, J. A., O. S. Cameiro, and J. M. Maia. 2001. Monitoring the evolution of morphology of polymer blends upon manufacturing of microfibrillar reinforced composites. International Journal of Polymeric Materials 50 445-A67. 

Evstatiev, M., Petrovich, S., and Fakirov, S. (1993) Microfibrillar reinforced composites from binary and ternary blends of polyesters and Nylon 6. Macromolecules, 26, 5219 - 5226. 

S. (1996) Morphology of microfibrillar reinforced composites from polymer blends. Polymer, 37, 4455-4463. 

Microfibrillar reinforced composites—new materials fi om polymer blends. Adv. Mater., 6, 395—398. 

Friedrich, K., Evstatiev, M., Fakirov, S., Evstatiev, O., Ishii, M., and Harrass, M. (2005) Microfibrillar reinforced composites from PET/PP blends processing, morphology and mechanical properties. Compos. Sci. TechnoL, 65, 107—116. 

ABSTRACT. Chemical interactions (additional condensation and transreactions) on the interfaces of condensation polymers (nylons and polyesters) are discussed. In addition to the recently discovered phenomenon of chemical healing, a new type of composites from polymer blends - the microfibrillar reinforced ones are introduced. It is demonstrated that interfacial chemical Interactions result in the formation of a new interphase representing a copolymer of the blended components and playing the role of selfcompatibilizer. 

The described phenomena are of particular importance for incompatible blends of condensation polymers as far as interfaces are available. This is demonstrated on the recently discovered [ ] microfibrillar reinforced composites. 

Sarkissova M, Harrats C, Groeninckx G and Thomas S (2004) Design and characterisation of microfibrillar reinforced composite materials based on PET/PA12 blends. Compos Part A 35 489-499. 

Fakirov S, Evstatiev M and Petrovich S (1993) Microfibrillar reinforced composites, Macromolecules 26 5219-5226. 

Fakirov S, Evstatiev M, Friedrich K (2000) From polymer blends to microfibrillar reinforced composites, in Polymer Blends. Vol 2 Performance (Eds. Paul D R and Bucknall C B) John Wiley Sons, New York, pp. 455-475. 

Evstatiev M, Fakirov and Friedrich K (2000) Microfibrillar reinforced composite another approach to polymer blends processing, in Structure Development during Polymer Processing (Eds. Cunha A and Fakirov S) Kluwer Academic Pubhshers, Dordrecht, Netherlands, pp. 311-325. 

Fakirov S, Kamo H, Evstatiev M and Friedrich K (2004) Microfibrillar reinforced composites from PET/LDPE blends morphology and mechanical properties, J Macromol Sci Part B Phys 43 775-789. 

Friedrich K, Ueda E, Kamo H, Evstatiev M, Fakirov S and Krasteva B (2002) Direct electron microscopic observation of transcrystalline layers in microfibrillar reinforced poljuner-polymer composites, J Mater Sci 37 4299-4305. 

Fakirov S and Evstatiev M (1994) Microfibrillar reinforced composites - new materials from polymer blends, Adv Mater 6 395-398. 

From this view, the authors have used a new approach called melt extrusion-hot stretching-quenching to prepare two categories of CPC (isotropic and anisotropic CPC) based on in situ microfibril reinforced polymer-polymer composites. This chapter briefly describes our recent work on several conductive in situ microfibrillar reinforced composites via hot stretching. 

Zhang Y C, Dai K, Tang J H, Ji X and Li Z M (2010) Anisotropically conductive polymer composites with a selective distribution of carbon black in an in situ microfibrillar reinforced blend, Mater Lett 64 1430-1432. 

It is generally accepted [16] that the mechanical properties of the MFC, with optimized composition made under best processing conditions, are superior to those of the corresponding neat matrix material due to the high aspect ratio (AR) of the crystalline and oriented microfibrillar reinforcement, and in view of the various possibilities to strengthen the matrix-fibril interface by compatibilization or transcrystallization. All of the systematic mechanical studies on MFC were made with systems based on polyolefin matrices reinforced by PET microfibrils and no such studies are available for PE/PA MFC systems. 

Evstatiev M, Fakirov S, Bechtold G and Friedrich K (2000) Structure-property relationships of injection- and compression-molded microfibrillar-reinforced PET/PA6 composites, Adv Polym Technol 19 249-259. 

Evstatiev M, Fakirov S and Schultz J M (1993) Microfibrillar reinforced composite from drawn poly(ethylene terephthaIate)/nyIon-6 blend, Po/ymer 34 4669-4679. 

Fakirov S, Evstatiev M and Friedrich K (1998) Microfibrillar reinforced composites from polymer blends, in Polymerwerkstoffe 1998 Verarbeiterung, Anwendung, Recycling (Eds. Radusch H J and Vogel J) Martin-Luther-Universitat, Halle-Wittenberg, Halle/Saale, Germany, pp. 123-156. 

Evstatiev M, Fakirov S and Friedrich K (2005) Manufacturing and characterization of microfibrillar reinforced composites from polymer blends, in Polymer Composites Prom Nano- to Macroscale (Eds. Friedrich K, Fakirov S and Zhang Z) Springer, New York, NY, pp. 149-167. 

Denchev Z, Evstatiev M, Fakirov S, Friedrich K and PolKo M (1998) Microfibrillar reinforced composites the role of the chemical interactions at the fibril-matrix interface, Adv Comp Mater 7 313-324. 

Friedrich K, Evstatiev M, Fakirov S, Evstatiev 0, Ishii M and Harrass M (2005) Microfibrillar Reinforced Composites from PET/PP Blends Processing, Morphology and Mechanical Properties, Compos Sci Technol 65 107-116. 

Taepaiboon P, Junkasem J, Dangtungee R, Amornsakchai T and Supaphol P (2006) In situ microfibrillar-reinforced composites of isotactic polypropylene/recycled poly(ethylene terephthalate) system and effect of compatibilizer, J Appl Polym Sci 102 1173-1181. 

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