Effect of EVA on thermal stability, flammability, mechanical properties of HDPE/EVA/Mg(OH)2 composites

2017 Global Conference on Polymer and Composite Materials

材料科学;化学

Cao, R.^1 ; Deng, Z.L.^2 ; Ma, Y.H.^3 ; Chen, X.L.^3

School of Mechanical Engineering, Chengdu Textile College, Chengdu

611731, China^1

School of Economics and Management, Chengdu Textile College, Chengdu

611731, China^2

Key Laboratory of Advanced Materials Technology Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu

610031, China^3

关键词: Early degradations;    Ethylene vinyl acetates;    Heat Release Rate (HRR);    High density polyethylene(HDPE);    Initial decomposition temperatures;    Limiting Oxygen Index;    Stability analysis;    Total heat release;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/213/1/012002/pdf
DOI  :  10.1088/1757-899X/213/1/012002

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work, ethylene vinyl acetate (EVA) is introduced to improve the properties of high-density polyethylene (HDPE)/magnesium hydroxide (MH) composites. The thermal stability, flame retardancy and mechanical properties of HDPE/EVA/MH composites are investigated and discussed. With increasing content of EVA, the limiting oxygen index (LOI) of the composites increases. The thermal stability analysis shows that the initial decomposition temperature begins at a low temperature; however, the residues of the composites at 600C increase when HDPE is replaced by small amounts of EVA. The early degradation absorbs heat, dilute oxygen and residue. During this process, it protects the matrix inside. Compared with the HDPE/MH and EVA/MH composites, the ternary HDPE/EVA/MH composites exhibit better flame retardancy by increasing the LOI values, and reducing the heat release rate (HRR) and total heat release (THR). With increasing content of EVA, the mechanical properties can also be improved, which is attributed to the good affinity between EVA and MH particles.