Plasma-graft polymerization of vinyl monomers with reactive groups onto a surface of poly(p-phenylene terephthalamide) fiber

✍ Scribed by Kenji Yamada; Toshihide Haraguchi; Tisato Kajiyama

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 864 KB
• Volume: 60
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960613)60:11<1847::aid-app8>3.0.co;2-l

✦ Synopsis

The mechanical properties of a fiber-reinforced plastic are influenced by the adhesion between a reinforcing fiber and a matrix resin. In this work we tried to obtain strong adhesion between Kevlar 4gTM yarn and a matrix resin through the formation of covalent bonds. Reactive groups were introduced onto a surface of the yarn by means of plasmagraft polymerization and then reacted with an epoxy resin/curing agent mixture as a matrix resin to form covalent bonds. Glycidyl methacrylate and acrylamide were used as monomers for plasma-graft polymerization. The degree of grafting was increased with increasing polymerization time. The grafted yarns enclosed with diglycidal ether of bisphenol-A/triethylenetetramine 2.2 : 1 mixture were pulled out to obtain pull-out force after curing.

The pull-out force increased with increasing degrees of grafting. The covalent bonds formed between the graft polymer and the matrix resin result in an increment of pull-out force.