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Autor     Chenguang Yao and Guisheng Yang
Titel    Poly(trimethylene terephthalate)/silica nanocomposites prepared by dual in situ polymerization: synthesis, morphology, crystallization behavior and mechanical properties
Zeitschrift    Polymer International
Datum    April 2010
Nummer    Volume 59, Issue 4
Seiten    492–500
DOI    10.1002/pi.2727
URL    http://onlinelibrary.wiley.com/doi/10.1002/pi.2727/abstract

Literaturverz.   

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Fußnoten    no
Fragmente    1


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[1.] Mrs/Fragment 013 06 - Diskussion
Zuletzt bearbeitet: 2015-04-25 22:30:09 WiseWoman
Fragment, Gesichtet, Mrs, SMWFragment, Schutzlevel sysop, Verschleierung, Yao and Yang 2010

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Seite: 13, Zeilen: 6-22
Quelle: Yao and Yang 2010
Seite(n): 492, Zeilen: r. Sp.; 6-11; Abstract
Poly (trimethylene terephthalate) (PTT) is a relatively new type of linear aromatic polyester. During recent decades, it has attracted attention not only because of its excellent mechanical and electrical properties, but also because one of its raw materials, 1,3-propanediol, is a renewable resource, which can be derived from renewable materials such as corn and starch. The sol–gel technique has provided promising opportunities for the preparation of polymer/inorganic hybrid materials at the molecular level, which ensures the inorganic particles, are well dispersed in the organic matrix. In this study [38], poly (trimethylene terephthalate) (PTT)/silica nanocomposites were fabricated via the sol–gel technique and in-situ polycondensation. Fourier transform infrared and nuclear magnetic resonance analyses confirmed that some PTT molecular chains were grafted to the surface of silica. Unlike pure PTT, the grafted PTT was insoluble in a mixed solvent of chloroform and hexafluoro-2-propanol. Both transmission electron microscopy and scanning electron microscopy showed that the silica particles, with a size of 40–50 nm, were homogeneously dispersed in the PTT matrix with no preferential accumulation in any region. Differential scanning calorimetry revealed that the glass transition temperature and cold-crystallization peak of the composites gradually increased with increasing silica loading. A simultaneous increase of stiffness and toughness was observed for the concentration of nanocomposites.

[38] ISO 2076, AUSG. 12.89: Generic names for man-made fibers. International Organization for Standardization

Poly(trimethylene terephthalate) (PTT) is a relatively new type of linear aromatic polyester. During recent decades, it has attracted attention not only because of its excellent mechanical and electrical properties, 20 but also because one of its raw materials, 1,3-propanediol, is a renewable resource, which can be derived from renewable materials such as corn and starch.

[Abstract]

The sol–gel technique has provided promising opportunities for the preparation of polymer/inorganic hybrid materials at the molecular level, which ensures the inorganic particles are well dispersed in the organic matrix. In this work, poly(trimethylene terephthalate) (PTT)/silica nanocomposites were fabricated via the sol–gel technique and in situ polymerization. Fourier transform infrared and nuclear magnetic resonance analyses confirmed that some PTT molecular chains were grafted to the surface of silica. Unlike pure PTT, the grafted PTT was insoluble in a mixed solvent of chloroform and hexafluoro-2-propanol. Both transmission electron microscopy and scanning electron microscopy showed that the silica particles, with a size of 40–50 nm, were homogeneously dispersed in the PTT matrix with no preferential accumulation in any region. Differential scanning calorimetry revealed that the glass transition temperature and cold-crystallization peak of the composites gradually increased with increasing silica loading. A simultaneous increase of stiffness and toughness was observed for the nanocomposites.


[20] Wu J, Schultz JM, Samon JM, Pangelinan AB and Chuah HH, Polymer 42:7141 (2001).

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