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Preparation of a new dialdehyde starch derivative and investigation of its thermoplastic properties.
- Source :
-
Journal of Polymer Research . May2010, Vol. 17 Issue 3, p439-446. 8p. 1 Diagram, 4 Charts, 7 Graphs. - Publication Year :
- 2010
-
Abstract
- In order to obtain thermoplastic starch plastics with improved properties, a novel method of starch modification was developed in this study. Starch derivatives were prepared using the following procedures: pea starch was first oxidized to make dialdehyde starch (DAS) by sodium periodate under mild conditions, and this was then acetalized with glycol to give Gly-ADS. The modified starch was characterized by FT-IR, 1H-NMR, TG, DSC, and XRD. The TG curves indicated that the thermal stability of Gly-ADS was better than that of DAS. The glass transition temperature of Gly-ADS with 95% carbonyl content (Gly-ADS95) was 97 °C by DSC. Although the intrinsic viscosity of DAS was less than that of pea starch, thermoplastic Gly-ADS (TPGly-ADS) exhibited good mechanical properties. The influence of moisture absorption on the mechanical properties of TPGly-ADS was also investigated. The results showed that TPGly-ADS possesses improved water resistance: the highest moisture absorption of TPGly-ADS95 was about 11%, and the tensile strength and the elongation at break were 18.1–14.6 MPa and 5.3–18%, respectively. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10229760
- Volume :
- 17
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Polymer Research
- Publication Type :
- Academic Journal
- Accession number :
- 48827687
- Full Text :
- https://doi.org/10.1007/s10965-009-9330-7