Technology and key equipment for producing carbon fiber core rods

Abstract

The invention discloses a technology and key equipment for producing carbon fiber core rods, and relates to a technology and equipment for producing carbon fiber rods. The technology is formed by improvement based on a process route of producing acrylic fibers with dimethyl sulfoxide (DMSO) as a solvent and azodiisobutyronitrile (AIBN) as an initiator by continuous solution polymerization with high conversion rate (95) and wet spinning. The adopted copolymerization monomer comprises acrylonitrile, methyl acrylate (MA) and itaconic acid (ITA). The technology comprises the processes of: (1) polymerization process control; and (2) spinning process control. The technology for producing polyacrylonitrile protofilament for high-strength carbon fibers by using the dimethyl sulfoxide one-step method (high conversion rate) and wet spinning has the characteristics of simple and reasonable flow, good stability of the stock solution, high conversion rate (95), high molecular weight of polymers, narrow distribution (the distribution index is 2.3) and the like, and is easy to control; and the polyacrylonitrile protofilament produced by using the technology completely meets the requirement for producing the high-strength carbon fibers.

Description

technical field [0001] The invention relates to a carbon fiber rod production process and production equipment. Background technique [0002] Carbon fiber is one of the most important new materials in the world today, and the key to its production is the production of its precursor. The high-strength carbon fiber is represented by the polyacrylonitrile carbon fiber with the brand name T-1000 of Toray Corporation in Japan. Its tensile strength is as high as 7050MPa, the tensile modulus is 259GPa, and the elongation at break is 2.4; the high-model carbon fiber is produced by Meimu Petoca Company. Carbon[e HM-85 pitch carbon fiber is the representative, its tensile modulus is as high as 850GPa, close to the theoretical modulus of graphite single crystal 1020GPa. my country's carbon fiber production level is far behind the world's advanced level, and the output is limited by the original silk. In order to change this situation, relevant domestic factories and scientific resear...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a carbon fiber mandrel production process and key equipment. The invention solves the problems of the existing carbon fiber production process, which are complicated, not easy to control, poor in stability of the stock solution, and low in conversion rate