| 热致液晶高分子及其共混物的流变性能 |
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| 引用本文： | 益小苏,韦联生,王惠民.热致液晶高分子及其共混物的流变性能[J].材料研究学报,1992,6(3):256-260. |
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| 作者姓名： | 益小苏 韦联生 王惠民 |
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| 作者单位： | 浙江大学
(益小苏，韦联生)，浙江大学(王惠民) |
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| 基金项目： | 国家自然科学基金,58903427;;国家高技术新材料委员会资助 |
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| 摘 要： | 在 Instron 毛细管流变仪上测定了热致液晶高分子 KU 9221/聚碳酸酯(PC)共混物和热致液晶高分子 KU 9231/聚醚砜(PES)共混物的流变性能。低切变速率下,液晶高分子的粘度大于 PC 和 PES 的粘度,液晶的加入未能使 PC 和 PES 的粘度下降。高切变速率(通常注塑成型的注塑速率)下,液晶的加入能显著降低体系的粘度。低切变速率下液晶相尺寸大,长径比小。高切变速率下液晶相尺寸小,长径比大。
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| 关 键 词： | 热致液晶高分子 共混 流变性能 |
| 收稿时间： | 1992-06-25 |
| 修稿时间： | 1992-06-25 |
RHEOLOGIC STUDIES OF THERMOTROPIC LIQUID CRYSTALLINE POLYMERS AND THEIR BLENDS |
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| YI Xiaosu,WEI Liansheng,WANG Huimin.RHEOLOGIC STUDIES OF THERMOTROPIC LIQUID CRYSTALLINE POLYMERS AND THEIR BLENDS[J].Chinese Journal of Materials Research,1992,6(3):256-260. |
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| Authors: | YI Xiaosu WEI Liansheng WANG Huimin |
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| Affiliation: | YI Xiaosu,WEI Liansheng,WANG Huimin(Zhejiang University,Hangzhou) |
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| Abstract: | Rheologic studies of thermotropic liquid crystalline polymers(TLCP)KU9221/polycarbonate(PC)and KU 9231/polyether sulfone(PES)blends were carried out byusing an Instron capillary rheometer.The flow curves show that the viscosity of the TLCP ishigher than those of both PC,PES and their blends with TLCP at low shear rate.At high shearrate,such as normal injection rate,however,the viscosity of the blends is significantly reduced.The TLCP phases are dispersed in greater size and in smaller aspect ratio when extruded at lowshear rate.The dispersion is finer and the aspect ratio increases at high shear rate. |
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| Keywords: | thermotropic liquid crystalline polymers blend rheological property |
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