Vol. 1 No. 1 (2018)

Open Access

Review

Article ID: 104

Polyethylene plastic production process

by Xiuhua Zhong, Xudong Zhao, Yongkang Qian, Yan Zou

Insight - Material Science, Vol.1, No.1, 2018; 5002 Views, 279 PDF Downloads

Polyethylene has become the most important polyolefin plastic with excellent mechanical properties, processing properties and chemical stability. It is used in the production of film, packaging and pipe. However, the non-polar property and low rigidity limit its application in certain fields. The new progress of chemical and physical modification upon polyethylene are reviewed. The former includes graft modification, chlorination, copolymerization modification, crosslinking modification, chlorosulfonation modification and plasma modification. There are different methods of polyethylene production which include high-, medium- and low-pressure polyethylene. All three methods had their own benefits and shortcomings which coexist in the industry. 

Open Access

Review

Article ID: 103

New Technology of Making NdFeB by Sintering

by Xiaofen Zhu

Insight - Material Science, Vol.1, No.1, 2018; 820 Views, 63 PDF Downloads

Sintered NdFeB as a third-generation rare earth permanent magnet material, has been in rapid development since 1980’s due to its broad industrial applications and high electromagnetic performance. Sintered NdFeB metal materials can easily be oxidized, so future efforts to improve their antioxidative stability are required and the study of new manufacturing technology and new technology is necessary. At present, the traditional technology of sintering NdFeB is discussed, together with the processing technology of powder preparation, hydroforming and vacuum sintering. The article focuses on the milling and forming process, including the traditional ball mill to hydrogen explosion, air grinding powder, and dry magnetic field molding to wet pressure magnetic field oriented molding, to prevent the production process of oxidation, thereby enhancing the electromagnetic properties and their anti-corrosion antioxidant capacity. During the NdFeB sintering process, content of oxygen is regulated to control the phase change. As a result, electromagnetic properties of sintered NdFeB obtained a qualitative leap. 

Open Access

Review

Article ID: 105

Preparation and Forming Technology of Particle Reinforced Aluminum Matrix Composites

by Xiangrong Tian, Aiqin Zhu, Jishan Wei, Ranyang Han

Insight - Material Science, Vol.1, No.1, 2018; 749 Views, 23 PDF Downloads

This paper introduces the performance and preparation technology and forming technology of particle reinforced aluminum matrix composites. The application status of particle reinforced aluminum matrix composites is illustrated, and its development prospect is pointed out. 

Open Access

Review

Article ID: 106

Rocess Design of Fiber Reinforced Magnesium Matrix Composites

by Hualun Ding, Ximin Gong, iaoxuan Shang

Insight - Material Science, Vol.1, No.1, 2018; 805 Views, 28 PDF Downloads

This paper chooses magnesium as the matrix of composite materials, selects carbon fiber as reinforcement, and designs the composite scheme according to the structure and performance of Mg-based composites. The performance characteristics and application prospect of fiber-reinforced magnesium matrix composites are introduced. Wait. In this paper, the process of preparing carbon fiber magnesium matrix composites by compression casting method and spray deposition method is designed. The process flow chart of these two design schemes is determined by analyzing the principle of these two kinds of preparation methods, and the specific problems of the process are analyzed and summarized. 

Open Access

Article

Article ID: 107

Study on Carbazole-like Polymer Solar Cell Materials

by Zhe Dong, Hanzhong He, Guohui Shen

Insight - Material Science, Vol.1, No.1, 2018; 866 Views, 22 PDF Downloads

With the development of modern industry, the global energy crisis and air pollution problems become increasingly prominent. Solar energy has emerged as an ideal renewable energy by many countries’ attention. Solar cells are the most promising use of solar energy in the kind of concern. Compared with inorganic solar cells, polymer solar cells performance is more excellent and carbazole polymer materials with rigid fused ring structure, intramolecular electron transfer, good transport and easy to introduce a variety of multi-functional groups into the carbazole. The advantages of the ring in the field of solar cell materials show a wide range of potential applications. This paper describes the principles of polymer solar cells and several common donor materials. The precursors of carbazole polymers were designed and synthesized, and their structures were characterized.