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首页> 外文期刊>Journal of Applied Polymer Science >Measurement of residual stresses in injection-molded polymer parts by time-resolved fluorescence
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Measurement of residual stresses in injection-molded polymer parts by time-resolved fluorescence

机译：通过时间分辨荧光测量注塑成型的聚合物零件中的残余应力

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lTime-resolved fluorescence properties of 9-methylanthracene (9MAn) dispersed in film of polyvinylchloride (PVC) containing carbon black were studied under tensile loadings. The fluorescence lifetime of 9MAn decreased from 5.70 to 5.55 ns, whereas the stresses acting on the films increased from 0 to 3 MPa. The change in fluorescence lifetimes of 9MAn during the stress relaxation process showed that the fluorescence lifetimes were correlated with the stresses, not with the strains. The results suggest that 9MAn is a useful probe for monitoring stresses acting on the matrix. With the use of the fluorescence properties of 9MAn, the residual tensile stresses on the skin-layer of PVC injection-molded test pieces were estimated. The estimated residual stresses were about similar to 1 MPa. The residual stresses were relaxed to 0 MPa with annealing at 100degreesC. (C) 2002 John Wiley Sons, Inc. [References: 13]
机译：1在拉伸载荷作用下，研究了分散在含炭黑聚氯乙烯（PVC）薄膜中的9-甲基蒽（9MAn）的时间分辨荧光性能。 9MAn的荧光寿命从5.70 ns减少到5.55 ns，而作用在薄膜上的应力从0 MPa增加到3 MPa。 9MAn的荧光寿命在应力松弛过程中的变化表明，荧光寿命与应力相关，与菌株无关。结果表明9MAn是监测作用在基质上的应力的有用探针。利用9MAn的荧光特性，估算了PVC注塑试件表皮层的残余拉伸应力。估计的残余应力约为1 MPa。残余应力在100°C退火时松弛到0 MPa。 （C）2002 John Wiley Sons，Inc. [参考：13]

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