Microbond testing of the interface in glass fibre vinylester composites

The microbond test was used to investigate the interface strength (IFSS) in various glass fibre-vinylester (VE) composite systems and a number of issues related sample preparation were identified. Cure schedules that produce well-reacted VE polymers on macroscale did not result cured microdroplets. Hence, could be carried out samples with same cure history as composites. Testable microdroplet only obtained when resin under an inert atmosphere. Higher IFSS values by raising final temperature schedule. Glass fibres full sizing gave significantly higher apparent comparedf bare or fibre coated silane coupling agent. It discovered measured compatible approximately doubled mounted using epoxy glue instead cyanoacrylate glue. This phenomenon appears deposition vapours onto surface during preparation. is concluded great care must taken ensuring effects observed are evidence real material characteristics artefacts