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摘要
探讨了超低温处理对位芳纶纤维改善纤维表面摩擦因数的可行性。结果表明:对位芳纶纤维经过液氮超低温处理,其特性黏度、分子量、聚合度、结晶度和断裂强度均随超低温处理时间的增加出现不同程度的下降,纤维表面摩擦因数(静态、动态)随超低温处理时间的增加出现不同程度的上升,纤维的分子结构保持不变,在1～2h之间时,纤维表面摩擦因数取得最值,断裂强度仅下降20%左右,验证了超低温处理可提高对位芳纶纤维表面摩擦因数。
Abstract
The feasibility of treating para-aramid fiber with ultra-low temperature to improve the friction coefficient of fiber surface was discussed.The tests results showed that,after being treated with liquid nitrogen temperature,the intrinsic viscosity,molecular weight,degree of polymerization,crystallinity and tensile strength of the para aramid fibers were all decreased with the increasing of the cryogenic treatment time in varying degrees,while the fiber surface friction factor (static and dynamic) appeared varying degree rising.The molecular structure of the fiber remained the same before and after processing.When the temperature kept with 1～2h,the friction coefficient of the fiber surface reached to its maximum value,and the fracture strength only decreased by about 20%,which verified that it was feasible to improve the friction coefficient of the fiber surface by ultra-low temperature treatment.
关键词
超低温
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对位芳纶
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分子结构
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断裂强度
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纤维表面摩擦因数
Key words
ultra-low temperature
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para aramid
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molecular structure
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tensile strength
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fiber surface friction factor
超低温处理改性对对位芳纶纤维表面摩擦性能的影响[J].
化工新型材料, 2022, 50(11): 87-89 DOI:10.19817/j.cnki.issn1006-3536.2022.11.017
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基金资助
江西省教育厅科学技术研究项目(GJJ202405)
