Study on Blending of Wall Material of the Nonel Tube by CSW/PE-g-MAH.

Hong-Wei Li,Huan Li,Zhan Lei,Ji-Chang Gui,Ji-Nian Yang,Bin-Bin Zhang

doi:10.1155/2019/7590692

Abstract

In order to improve the strength and resistance of ordinary nonel tubes, calcium sulfate whiskers (CSW, treated with silane coupling agent) and maleic anhydride grafted polyethylene (PE-g-MAH) are used to control the wall material of the nonel tube that the blending of the low-density polyethylene was enhanced. The effects of mass fraction of CSW or PE-g-MAH on the tensile properties, interfacial structure, melting and crystallization characteristics, and thermal decomposition behavior of the composite system were studied, and the thermal decomposition kinetics were calculated. The results show that, relative to pure LDPE, the strength of LDPE/CSW (85/15) is increased by 7.58%, and the strength of LDPE/CSW/PE-g-MAH (84/15/1) is increased by 7.58%. The addition of CSW or PE-g-MAH has gradually changed the fracture mode of the LDPE matrix. Thermal analysis shows that CSW can reduce the crystallinity of LDPE. The melting and crystallization characteristics of LDPE/CSW/PE-g-MAH composites have little effect, but the thermal decomposition stability is improved. The kinetic analysis showed that the reaction order (n) was around 1, CSW could improve LDPE/CSW thermal decomposition activation energy, and PE-g-MAH increased the thermal decomposition activation energy of LDPE/CSW/PE-g-MAH.

Highlights

Ordinary nonel tube has excellent ignition characteristics. e whole blasting network can be triggered by electric spark, which avoids the requirement of electric network for initiating current [1, 2]. e detonation method of the nonel tube was observed under high-speed cameras [3, 4], and the design and connection method of the blasting network was widely studied and applied [5,6,7,8]. e source material of ordinary plastic nonel tube is low-density polyethylene (LDPE), which has the characteristics of good toughness, easy processing, and wide application range [9,10,11,12,13]
Mechanical Properties. e stress-strain curves of LDPE/ Calcium sulfate whiskers (CSW)/PE-g-MAH composites are shown in Figure 1, and other mechanical properties are shown in Table 2. e tensile strength, elastic modulus, and elongation at break of the material correspond to their strength, stiffness, and toughness [33,34,35]
After adding PE-gMAH, the strength and stiffness are increased again, but as the mass fraction of PE-g-MAH increases, the increase in the tensile strength and modulus of elasticity of the composite material was less. e introduction of CSW showed that the matrix fracture failure mode of LDPE changed, and the reintroduction of PE-g-MAH increased the compatible phase of LDPE/CSW interface and strengthened the fracture failure mode of 85/15/0. e tensile toughness calculated according to the method of [36] is shown in Table 2 and is substantially consistent with its toughness and is reduced

Summary

Introduction

Ordinary nonel tube has excellent ignition characteristics. e whole blasting network can be triggered by electric spark, which avoids the requirement of electric network for initiating current [1, 2]. e detonation method of the nonel tube was observed under high-speed cameras [3, 4], and the design and connection method of the blasting network was widely studied and applied [5,6,7,8]. e source material of ordinary plastic nonel tube is low-density polyethylene (LDPE), which has the characteristics of good toughness, easy processing, and wide application range [9,10,11,12,13]. E source material of ordinary plastic nonel tube is low-density polyethylene (LDPE), which has the characteristics of good toughness, easy processing, and wide application range [9,10,11,12,13]. E purpose of these studies was to improve the strength and heat resistance of the nonel tube and to increase the range of use of the nonel tube. By observing the cross-sectional morphology and melt crystallization properties of LDPE/CSW/PE-gMAH composites and analyzing their thermogravimetric losses, the apparent activation energy was calculated and compared by Kissinger [29] and Carrasco et al [30, 31], who provided a reference for obtaining a material with high strength and good heat resistance

Experimental

Measurements

Results and Analysis