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就这样,先进复合材料引起人们的注意,Union Carbide公司致力于高性能碳纤维的开发,1963年使以人造丝为原料的连续纤维实现工业化。1964年发现在2800℃热处理时通过延伸能实现高模量和高强度。1965年“Thornel”25公诸于世,接着又开发了“Thornel”45、50和100。在美国、法国和德国,与硼纤维一样,这种人造丝系高弹、高强碳纤维作为复合材料用增强纤维而加以研究,主要在宇航领域的应用取得进展。但是随后PAN系及沥青系
In this way, advanced composites are attracting attention. Union Carbide is devoted to the development of high-performance carbon fibers. In 1963, continuous fibers made of rayon were industrialized. In 1964 it was found that high modulus and high strength can be achieved by extension at 2800 ° C heat treatment. 1965 “Thornel” 25 made known to the world, then developed “Thornel” 45, 50 and 100 again. In the United States, France and Germany, as with boron fibers, this rayon-based high-resilience and high-strength carbon fiber has been studied as a reinforcing fiber for composites and advances have been made mainly in the aerospace field. But then PAN system and asphalt system