Abstract
Polypropylene (PP)/layered silicate nanocomposites were prepared via simple melt mixing of three components, PP, layered silicates modified with octadecylamine (C18-MMT) and antioxidant, to investigate the role of antioxidant. TEM and X-ray scattering results confirmed the intercalated state of silicates in PP/layered silicate nanocomposites with antioxidant. In rheological and mechanical study, the nanocomposites with antioxidant showed higher properties than those of the unfilled PP. The nanocomposite with 5 wt% C18-MMT and 0.5 phr antioxidant exhibited about 1.4 times higher tensile modulus and 1.3 times higher storage modulus than the unfilled PP. However, PP/C18-MMT without antioxidant showed lower rheological values owing to the thermal decomposition of PP and the poor compatibility between PP and C18-MMT. It could be concluded that antioxidants played an important role in enhancing the compatibility between PP and C18-MMT. According to the real time X-ray diffraction, the nanocomposite showed the weak ordering of PP crystals than the unfilled PP in the load-extension plateau region of elongation.
Original language | English |
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Pages (from-to) | 7719-7727 |
Number of pages | 9 |
Journal | Polymer |
Volume | 45 |
Issue number | 22 |
DOIs | |
Publication status | Published - 2004 Oct 13 |
Externally published | Yes |
Bibliographical note
Funding Information:We thank LG-Caltex Oil Corporation for supporting this project. This work was supported in part by Brain Korea 21 program and by the Center for Advanced Functional Polymers. The assistance of the Pohang Accelerator Laboratory in performing in situ X-ray scattering measurements is gratefully acknowledged.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
Keywords
- Layered silicate
- Nanocomposites
- Polypropylene (PP)
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry