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| Graft Modification of Starch by Rheological Phase Method Based on Damping Characteristic |
| WANG Jiankun, HAN Dawei, LV Hairong |
| School of Textiles, Tianjin Polytechnic University, Tianjin 300160 |
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Cite this article:
WANG Jiankun HAN Dawei LV Hairong. Graft Modification of Starch by Rheological Phase Method Based on Damping Characteristic. Chin J Mater Res, 2010, 24(4): 348-352.
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Abstract A non-contacting infrared thermometer was used to measure the temperature at the film surface in waving area for investigating dynamic mechanical properties of starch blend film and improving its performance, such as brittleness, hardness, and size shedding. Dynamic thermomechanical analysis(DMA) was conducted to investigating the dynamic mechanical properties of PVA and starch blend film and the starch was grafted by rheological phase method to improve the damping characteristic. The results showed that the temperature at the blend film surface in waving area ranged from 28.3oC to 35.1oC. In this temperature range, the damping characteristic of PVA blend film was much better than that of starch blend film, and the storage modulus (400–450 MPa) and loss modulus (25–30 MPa) of PVA were also higher than those of starch of which the storage modulus was less than 50 MPa and the loss modulus was less than 5 MPa. After grafted by rheological phase method, the storage modulus and loss modulus of graft starch blend film reached up to 500–520 MPa and 35–40 MPa respectively, increased by 900% and 600%. So through graft modification, the damping characteristic of starch blend film can be improved obviously.
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Received: 05 November 2009
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| Fund: Supported by Tianjin Science and Technology Planning Projects No.04310471. |
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