| Influence of Mica Particles on the Rheological Properties and Thermal Stability of Poly（ lactic acid） |
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| 引用本文： | 朱凤博,张顺花. Influence of Mica Particles on the Rheological Properties and Thermal Stability of Poly（ lactic acid）[J]. 东华大学学报(英文版), 2014, 31(4): 433-436 |
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| 作者姓名： | 朱凤博 张顺花 |
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| 作者单位： | Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University,Hangzhou 310018, China |
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| 摘 要： | The influence of mica particles on the rheological and thermal properties of poly（ lactic acid）（ PLA） / mica composites were investigated by capillary rheometer and thermogravimetric（ TG）analysis. The results show that the PLA / mica blends are nonNewtonian pseudoplastic and display shear-thinning. The value of non-Newtonian index of the blends melt decreased obviously with the addition of mica particles but somehow even increased when shear rate exceeded 4 500 s- 1. In this work,it could be indicated that appropriate amount of mica particles could somehow enhance the resistance of PLA melt under high shear rate to deviate from Newtonian fluid. TG analysis shows that the thermal stability of PLA decreases a little after the incorporation of the mica particles.As mica particles decompose in a completely different way in contrast to PLA,this abnormal decrease of thermal stability of PLA / mica composite may be attributed to moisture stored between mica layers released at high temperature.
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| 关 键 词： | poly（lactic acid）（PLA） mica particles rheological behavior thermal stability |
Influence of Mica Particles on the Rheological Properties and Thermal Stability of Poly (lactic acid) |
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| ZHU Feng-bo,ZHANG Shun-hua. Influence of Mica Particles on the Rheological Properties and Thermal Stability of Poly (lactic acid)[J]. Journal of Donghua University, 2014, 31(4): 433-436 |
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| Authors: | ZHU Feng-bo ZHANG Shun-hua |
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| Affiliation: | Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University,Hangzhou 310018, China |
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| Abstract: | The influence of mica particles on the rheological and thermal properties of poly( lactic acid)( PLA) / mica composites were investigated by capillary rheometer and thermogravimetric( TG)analysis. The results show that the PLA / mica blends are nonNewtonian pseudoplastic and display shear-thinning. The value of non-Newtonian index of the blends melt decreased obviously with the addition of mica particles but somehow even increased when shear rate exceeded 4 500 s- 1. In this work,it could be indicated that appropriate amount of mica particles could somehow enhance the resistance of PLA melt under high shear rate to deviate from Newtonian fluid. TG analysis shows that the thermal stability of PLA decreases a little after the incorporation of the mica particles.As mica particles decompose in a completely different way in contrast to PLA,this abnormal decrease of thermal stability of PLA / mica composite may be attributed to moisture stored between mica layers released at high temperature. |
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| Keywords: | poly (lactic acid) (PLA) mica particles rheological behavior thermal stability |
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