| 刘俊华,张美云,陆赵情,刘 俊.对位芳纶纤维的动态力学分析[J].中国造纸学报,2013,28(4):1-4 |
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| 对位芳纶纤维的动态力学分析 |
| Dynamic Mechanical Analysis of Para Aramid Fiber |
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| DOI： |
| 中文关键词: 对位芳纶纤维 对位芳纶纸 动态力学 |
| Key Words:para aramid fiber para aramid paper dynamic mechanics |
| 基金项目:国家高技术研究发展计划（863）重大项目（2012AA03A208）；陕西省科技统筹创新工程计划项目（2011ktcg01-19）；陕西科技大学研究生创新基金项目。 |
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| 中文摘要: |
| 基于对对位芳纶纤维及对位芳纶纸进行动态力学分析，探究了对位芳纶纤维在一定频率的交变力作用下的应变行为及纸基材料内部分子的运动。研究表明，温度由低到高时，对位芳纶纸基材料经历了玻璃态、高弹态、黏流态3种不同的状态；由于结晶度较高的对位芳纶短切纤维的贡献，配抄纸样的初始储能模量高于纯浆粕纤维；热压可以使芳纶浆粕纤维发生重结晶，提高结晶度，有利于改善纤维的储能模量；通过动态力学温度谱图，可以从微观角度说明抄造芳纶纸用的对位芳纶短切纤维和对位芳纶浆粕纤维的共混性很好。 |
| Abstract: |
| Para aramid fiber is a kind of polymer material with high linear orientation and crystallization, the degree of freedom among the existing amorphous region is bigger, so there will be energy losses under the action of stress, showing the property of viscoelasticity. The strain behavior and internal motion of para aramid fiber under a certain frequency of alternating force were explored in this experiment. Results showed that as the temperature rose from low to high, three different mechanical states i.e. glassy state, rubber state and fluid state were appeared on dynamic mechanical temperature curve, due to the contribution of the fiber with high crystallinity, the initial energy storage modulus of mixed aramid paper was higher than pure fabrid paper. Hot pressing could help make the para aramid fiber recrystallization and increasing the crystallinity, so it could improve the storage modulus of the para aramid fiber. On the other hand, the dynamic mechanical analysis spectrum indicated that the compatibility of two kinds of fibers was very good. |
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