Preparation And Research Performance On Basalt Fiber Reinforced Vinyl Resin Composites

The basalt fiber reinforced resin matrix composite has low weight,high stress and corrosion resistance,resistance friction fatigue properties.It has great application potential for marine engineering field.Marine environmental factors should be considered,especially its thermal-cold cycling and medium corrosion.In this article,the method of Fourier Transform infrared(FTIR),Differential Scanning Calorimetry(DSC),Thermogravimetry Analysis(TG)were used to study on the curing behavior of vinyl ester resin and then get its curing technology.The changing of tensile stress and impact stress of composite on room and thermal-cold temperature was estimated silicon coupling agents modification effect on interface between resin and fiber.In addition,fracture surface morphology was observed by scanning electron microscope(SEM)to study the damage mechanism of the composite system.Finally,we studied the corrosion resistance property of the composite system by the method of marinating in water,hydrochloride,sodium hydroxide,sodium chloride,oil for some time.The results indicated that there were ester bonds and methyl in vinyl resin according to curing behavior analysis and the epoxy group turned into ether bond which belong to inertia bond.The DSC study showed that the effect of initiator V388 on resin curing is the best one among the four types(BPO,LP0,TBPB and V388).And the best rate was in weight of 2%.Under different heating rate,theoretic gelling temperature,curing temperature and post-treating temperature were calculated respectively.The performance of TG curves indicated that initial decomposition temperature,the largest decomposition temperature and final decomposition temperature were 350.8?,436.55?,548.35?respectively.The results of tensile stress of composite materials showed that,the tensile stress reached to 62.9 MPa for the basalt fiber felt content of 20%.The composite materials modified by silicon coupling agent improved 30%reached to 83.2 MPa.And when basalt fiber needle felt content from 27%,the tensile stress reached to 85.9 MPa,modified by silicon coupling agent improved 16%reached to 99.5 MPa.The tensile stress of unidirectional basalt fiber cloth reinforced resin increased obviously,which were 513.3MPa and 627.0 MPa modified by silicon coupling agent before and after.The impact stress experiment result showed that the impact stress of basalt fiber felt,basalt fiber needle felt,unidirectional basalt fiber cloth composites were 142.7KJ/m~2?153.2 KJ/m~2?324.8 KJ/m~2respectively,and modified by silicon coupling agent improved 5%?14%?8%,then reached to 150.3KJ/m~2,175.2KJ/m~2,351.6 KJ/m~2.The growth rate of basalt fiber meddle felt and cloth in alkali liquor was largest than other liquor,and the growth rate of basalt fiber felt in water was largest.The research of thermal-cold(150?and-196?)cycling showed that the tensile stress of composite material was still keeping its stress.The properties of basalt fiber reinforced vinyl ester resin composite were comparatively stable.It had a good environmental adaptability.