期刊
POLYMER DEGRADATION AND STABILITY
卷 93, 期 5, 页码 889-895出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2008.02.007
关键词
poly(butylene succinate); silica; nanocomposite; biodegradation
资金
- National Research Foundation of Korea [핵06A1305] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A series of poly(butylene succinate)/silica (PBS/silica) nanocomposites were prepared by in situ polymerization. Solid-state Si-29 NMR and FTIR analysis indicated that silanol-bonded carbonyl groups are established within PBS/silica nanocomposite materials. Rheological effects inherent to the silica filler were evaluated by melt theological analysis as a function of shear force in the molten state. Despite high shear force, PBS/silica nanocomposites maintained a relatively high melt viscosity, attributable to a network structure resulting from covalent bonding between silica and the polymer chain. Nanocomposite material containing 3.5 wt% silica exhibited greatly improved mechanical properties. The tensile strength at break and elongation were ca. 38.6 MPa and 515%, while those of the parent PBS were 26.3 MPa and 96%, respectively. PBS/silica nanocomposites showed composition dependency on biodegradation ascribable to reduced crystallinity and preferential microbial attack. (C) 2008 Elsevier Ltd. All rights reserved.
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