Montmorillonite disperses in amorphous phase of RIM PA6 matrix via anionic ring opening polymerisation
| Autor: | Dengwang Lai, J. Wang, J. Yang, Du Xin Li |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Nanocomposite Polymers and Plastics General Chemical Engineering law.invention chemistry.chemical_compound Crystallinity Differential scanning calorimetry Montmorillonite Optical microscope chemistry law Transmission electron microscopy Polyamide Materials Chemistry Ceramics and Composites Heat deflection temperature Composite material |
| Zdroj: | Plastics, Rubber and Composites. 44:376-382 |
| ISSN: | 1743-2898 1465-8011 |
| DOI: | 10.1179/1743289815y.0000000033 |
| Popis: | The reaction injection moulding process was employed to prepare montmorillonite (O-MMT)/polyamide 6 (PA6) nanocomposites. O-MMT was functionalised by aminosilane in order to improve the compatibility and decrease the viscosity of caprolactam melts, which swell O-MMT. Small angle X-ray diffraction and transmission electron microscopy results demonstrated that PA6 was sufficiently polymerised via in situ anionic ring opening route at the interlayer of the premodified O-MMT that yields a disordered exfoliated structure. Wide angle X-ray diffraction, polarising optical microscopy and differential scanning calorimetry analysis indicated that the crystallinity of nanocomposites decreased as the loading of O-MMT increased. O-MMT can induce γ-phase crystals and eliminate perfect α-phase crystals into smaller imperfect crystals. The O-MMT primarily disperses in the amorphous phase of RIM PA6 matrix that improves the mechanical properties and heat distortion temperature (HDT) of nanocomposites. For the nanocomposit... |
| Databáze: | OpenAIRE |
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