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The Preparation and Performance Study of CBT Polymer Matrix Composites

Author: ChenCaiYang
Tutor: WengLvQian；CaoHaiLin
School: Harbin Institute of Technology
Course: Materials Science
Keywords: resin-based composite materials CBT low viscosity thermoplastic materials secondary processing formation process
CLC: TB332
Type: Master's thesis
Year: 2011
Downloads: 53
Quote: 0
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Abstract


As a new member of the material family, composite materials have unique properties, which make them have great potential in military and civilian applications. Resin-based composite materials possess the characteristics of light weight, higher specific strength modulus, good insulation properties and high performance/cost ratio. Resin-based composite materials have a half-century history, and are developed rapidly. They are favorable materials in aerospace, automotive, marine and power generation industries.The previous developments of resin-based composite materials are mainly about thermosetting resins. The thermosetting resins have the features of high strength, low processing viscosity and good dimensional stability, but their disadvantage is that after the cross linking of thermosetting resins, they form insoluble, non-melting materials with a network structure, which cannot be processed again and cannot be reused. Also the products do not have good toughness and form by-products during production from time to time.The advantages of thermoplastic resins include good toughness attributed to their linear structure, and reusable. The disadvantages are their high viscosity at processing temperature, difficulty to prepare composite materials with high filler content and poor rigidity.Cyclic butylene terephthalate (CBT) resin recently emerges as a new type of thermoplastic resin with a melting point of 190℃. When CBT is heated to melting point, it becomes a low viscosity liquid with excellent mobility. More importantly, CBT has the characteristics of rapid polymerization after the addition of catalysts since it can quickly open the ring structure to form polybutylene terephthalate (PBT) polymer, and no small molecules release during the process. CBT with excellent properties of both thermosetting and thermoplastic resin can be shaped by molding, injecting, rotational molding and other processes. CBT has the processing characteristics of low melt viscosity, low heating temperature and short production cycle, which are good for industry to reduce energy consumption and costs. The mechanical performance of CBT resin composites is good, and its impact resistant ability is better than that of epoxy resin, therefore it has potential in military and civilian applications. CBT resin is convenient in process, reusable. Some CBT products can replace the traditional epoxy resins and phenolic resins. In this sense, the research on the CBT resin composites technology and performance has academic significance and application value.In this study, the formation process and the properties of CBT resin-based composite materials with basalt fiber as reinforcing material are investigated. Furthermore, the composites with the fiber surface modified with nanoparticles are studied to improve their performance.

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials > Non-metallic composite materials
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