Morphology, Thermal Stability, and Mechanical Behavior of [Poly(propylene)-grafted Maleic Anhydride]-Layered Expanded Graphite Oxide Composites

✍ Scribed by Frances T. Cerezo; Christopher M. L. Preston; Robert A. Shanks

• Book ID: 102939781
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 585 KB
• Volume: 292
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.200600303

✦ Synopsis

Abstract

PP‐g‐MA‐layered EGO composites were prepared directly by solution blending. Two types of PP‐g‐MA/EGO composites were prepared using different mixing methods: distributive and dispersive. In this study, the effects of the mixing method of EGO on the crystalline structure and thermo‐mechanical properties of PP‐g‐MA/EGO composites are reported. WAXD exhibited a shift in 2__θ__ of the monoclinic (α) phase of PP‐g‐MA and (002) EGO peaks for PP‐g‐MA/EGO layered composites, which indicated a modification of the crystalline structure of PP‐g‐MA in the layered composites. DSC exhibited a single characteristic melting peak of monoclinic (α) crystalline phase PP‐g‐MA. The incorporation of EGO increased T~c~ indicating that the EGO acted as a nucleating agent for PP‐g‐MA. The crystallinity of the PP‐g‐MA/EGO composites was found to be dependent on the mixing method. Thermogravimetry demonstrated that PP‐g‐MA in the presence of EGO has higher degradation temperature, suggesting that the graphite particles acted as a thermal barrier material for PP‐g‐MA. DMA indicated that incorporation of EGO into PP‐g‐MA increased the storage modulus, due to the hydrogen bonding between EGO and MA of PP‐g‐MA.

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