The graft copolymer of PE with dibutyl maleate ( DBM), DBM g PE, has been prepared by solid graft. Existence of DBM g PE macromolecule was confirmed with IR spectrum. 采用固相接枝法制备了DBM-g-PE,用红外光谱分析证明了接枝物确实存在。
The results showed that the content and the crystallinity of PE in PP/ PE blend can be measured by infrared spectrum analysis. 结果表明:用红外光谱法可以测定PP/PE共混物中PE的含量和结晶度;
A local sound field Fourier Transform was proposed to get the simple angle spectrum. This method makes the surface scattering loss-versus-angle description convenient for PE models too and makes the surface sound scattering problem based on PE simply. 本文提出一种利用局部声场Fourier变换和波数关系得到局部声场角度谱的方法,使得PE声场的角度关系非常清楚,利用这种角度关系可以使基于PE的粗糙界面散射声场问题得以简化。
AE signals are complicated during the tension of PE/ PE laminates and characteristic of acoustic emission signals are significantly influenced by damage mechanism. Damage signals were different in the character of waveform and spectrum. PE/PE复合材料的拉伸破坏过程AE信号复杂,材料损伤破坏机制对声发射信号特征有显著的影响,不同破坏的信号在波形特征、频谱特征方面存在不同。