摘要
为构建结晶型材料的结晶度与介电常数之间的数学关系,根据正交试验的正交性,设置了不同注塑成型工艺参数,生产得到注塑样品,采用DSC差热分析法对样品的结晶度进行了测试,采用精密阻抗分析仪对样品的介电常数进行了测试,通过利用最小二乘法得到的数据组合,拟合得到结晶度与介电常数的数学模型,分析了2种模型的曲线拟合程度,并验证了拟合多项式的可靠性。结果表明,二次多项式模型拟合效果最佳,拟合得到的数学模型相关系数R为0.94,平均绝对误差为0.003,平均相对误差为0.936%,因此,该数学模型可用于描述PA66结晶度与介电常数之间的关系,为电容式传感器在线监测制品的结晶度提供了理论依据。
The purpose of this paper was to construct the mathematical relationship between the crystallinity and dielectric constant of crystalline materials. It provided theoretical basis for on-line monitoring of crystallinity of products by capacitive sensor. Through the orthogonality of orthogonal test,different injection molding process parameters were set to produce injection samples. The crystallinity of the samples was measured by DSC. The dielectric constant of the sample had been measured by precise impedance analyzer. The mathematical model between the crystallinity and the dielectric constant was fitted by the least square method. The curve fitting degree of the two models was analyzed,and the reliability of the fitting polynomials was verified. The results showed that the fitting effect of the quadratic polynomial model was the best. The correlation coefficient R of the fitted mathematical model was 0. 94,the average absolute error was 0. 003,and the average relative error was 0. 936%. Therefore,the mathematical model could be used to describe the relationship between the crystallinity and dielectric constant of PA66.
作者
梅建良
钱应平
梁明明
MEI Jianliang;QIAN Yingping;LIANG Mingming(Hubei Key Laboratory of Modern Manufacturing Quality Engineering,College of Mechanical Engineering,Hubei University of Technology,Wuhan,Hubei 430070,China)
出处
《塑料》
CAS
CSCD
北大核心
2020年第5期68-71,共4页
Plastics
关键词
注塑成型
正交试验
结晶度
介电常数
最小二乘法
injection molding
orthogonal test
crystallinity
dielectric constant
least square method
