声脉冲传播法测定纤维动态弹性模量方法实证与标准化  

Measurement of dynamic elastic modulus of fiber by sonic-pulse propagation method and its standardization verification

作　　者：徐星颖 刘方义 李红杰 李德利[4] 刘洪涛[1,2] XU Xingying;LIU Fangyi;LI Hongjie;LI Deli;LIU Hongtao(Provincial and Ministerial Co-constructing State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,China;School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430200,China;Shanghai Textile Industry Institute of Technical Supervision,Shanghai 200082,China;China Chemical Fibers Association,Beijing 100020,China)

机构地区：[1]武汉纺织大学省部共建纺织新材料与先进加工技术国家重点试验室,武汉430200 [2]武汉纺织大学材料科学与工程学院,武汉430200 [3]上海市纺织工业技术监督所,上海200082 [4]中国化学纤维工业协会,北京100020

出　　处：《纺织检测与标准》2021年第6期14-19,共6页Textile Testing and Standard

基　　金：国家标准委国家标准制定计划(20210918-T-469);高性能纤维及制品教育部重点试验室(B类)开放课题(2020)。

摘　　要：采用声速法纤维取向度/动态弹性模量测定仪,以涤纶单丝为试样,通过变换试样预张力和换能器隔距,分别测定对应的声波旅行时间。结果表明:不同预张力下所测得的声波旅行时间-换能器隔距散点数据与最小二乘法拟合直线高度相符,并可由外推法计算仪器系统的延迟时间T;、纤维中的声速C和动态弹性模量E的准确可靠值,且可根据已知的无规取向声速值C;计算赫尔曼取向因子F和取向角θ;延迟时间与换能器隔距和试样预张力都相关,而不是理论上的固有不变;倍长法计算优选的预张力为0.09~0.18 cN/dtex,换能器隔距为100 mm和200 mm,适合只需相对比较的工业应用和教学演示,而外推法更适于精确定量科研。Using a fiber orientation degree/dynamic elastic modulus tester with sonic velocity method,taking polyester monofilament as a sample, the corresponding sonic wave travel time is measured through changing the sample pre-tension and transducer spacing. The results show that the measured sonic wave travel time-transducer spacing scatter data under different pre-tensions are consistent with the fitting straight line via the least square method, and which shows that the extrapolation method can calculate the accurate and reliable values of the delay time T;of the instrument system, the sonic velocity C in the fiber and the dynamic elastic modulus E. Furthermore, the Hermans orientation factor F and orientation angle θcan be calculated according to the given random orientation sonic velocity C;. The delay time is obviously related to the transducer spacing, rather than the inherent invariance in theory. The optimal transducer spacing calculated via the double-length method is 100 mm and 200 mm, and the pre-tension is 0.09~0.18 cN/dtex. It is suitable for industrial application and teaching demonstration requiring only relative comparison, while the extrapolation method is more suitable for accurate quantitative scientific research.

关 键 词：动态弹性模量 声模量 取向 纺织纤维 声速 

分 类 号：TS102[轻工技术与工程—纺织工程] TS107[轻工技术与工程—纺织科学与工程]