Vinyl ester colophony (VE) it is epoxy resin open loop and addition of a yuan of not saturated carboxylic acid react and become, have the advantage with epoxy resin good corrosion resistance, be used extensively at anti-corrosive circumstance, be like demist implement, the domain such as electrobath, cooling tower; Corrode medium cent to be solution of acidity, alkalescent, salt 3 kinds big, because as luscious as reaction of acerbity, salt group is not had in VE element structure, all present the character that better acid-proof, salt corrodes. In VE synthesis process, annulus oxygen base open loop, ester radical introduces on molecular catenary base round, ester radical is incidental alkaline type hydrolyze, this reaction is not reversible reaction, cause material to destroy, hydrolysis speed suffers effect of pH indicator of temperature of molecular structure, environment, lye, because this is alkalescent,the environment needs make choice of specific structure is able to bear or endure corrupt material. Alkalescent environment includes the field such as lye chamfer, canister, use colophony to strengthen the composite material structure of fibre glass more, except corrode action, return existence to permeate, dissolve bilges, core absorbs effect, to remove the interference that above element brings, the article is able to bear or endure to colophony mould body only alkaline function undertakes study. VE uses annulus oxygen type to be able to be divided by place for double phenolic A VE, phenolic aldehyde VE two kinds big, different structure VE can be endless also to different contact corrosion resistance identical, via scholastic research, adjacent of density of medium temperature, chroma, ester radical, photograph base round space protects a block is an influence the main factor that sex of material alkali resistance corrodes, look from molecular structure angle, if can ester of effective slow down base suffer ambient conditions corrode action, can improve the alkali resistance performance of material, current, the alkali resistance on the market corrodes colophony to be given priority to with double phenolic A VE. The article is right low ester base double phenolic A VE is in density the corrosion resistance in solution of 25% NaOH of mark of 80 ℃ quality can undertake study, coequal experiment condition falls with comparative appearance A (tall ester base A of density double phenol VE) , comparative appearance B (double phenolic A VE, phenolic aldehyde VE mixes a structure) , comparative appearance C (phenolic aldehyde VE) , comparative appearance D (double phenolic A, different colophony is in test material rate of reservation of the flexural strength in NaOH solution, curve a model to measure reservation hardness withholds ratio of change of rate, quality reservation rate, ply, Bakeer the index such as rate, judge material alkali resistance corrodes function actor bad, experiment this, lye temperature 80 ℃ , material is endured corrode, collaboration of high temperature put together is used. Article experiment is to test colophony mould system below 80 ℃ condition alkali resistance function, remove other element interference, function of alkali resistance of colophony of comparable different type, through gathering anticorrosion data, provide a basis for select material of alkali resistance project, have very important sense to the development of the industry. 1 experiment part 1.1 raw material are low VE of ester radical density: A of MFE 711 double phenol VE, industrial level, huadongli is versed in limited company of polymer of university China prosperous; Comparative appearance A, double phenolic A VE, ester radical density relatively MFE 711 is tall 50% ; Comparative appearance B, VE of phenolic aldehyde of double phenolic A/ hybrid structure; Comparative appearance C, phenolic aldehyde VE; Comparative appearance D, colophony of double phenolic A not saturated polyester; Solidify agent (M-50 crosses ketone of oxidation armour second) : Industrial level, company of A Kesu Nobel; Solution of quality mark 25% NaOH: Match oneself. Machine of experiment of mechanical function of 1.2 instruments Instron 3382, yingsitelang; FA200N electron balance, limited company of instrument of Shanghai accurate science; BY-4030 thickness gauge, machinery plant of experiment of Yangzhou rich abundant; HBA-1 cling to family name sclerometer, dongguan city is exhibited roc electronic instrument limited company; Constant temperature of DHG-9240A electric heat rouses wind sweatbox, limited company of instrument of science of Shanghai neat glad. Body of mould of 1.3 preparation method curves batten preparation: Toughened glass clip holds 4mm spacing to lie between set make hollow pattern, colophony joins deaeration of solidify agent vacuumize, enter mould solidify, 24h drawing of patterns, engraving tool treatment curves sample, sample size 100mm*15mm, room temperature places 24h. Preparation of solution of quality mark 25%NaOH: Say to take 250g NaOH slow join 750ml to go in ionic water, mix is even, enter polyethylene container, quiet place comes solution is crystal, sampling demarcate, quality mark is adjusted to 25% . Curve sample 80 ℃ lye immerses processing: Curve sample to be put fill in having NaOH solution container, separate with spacer, assure to solution is full of all round sample, sealed container, put 80 ℃ oven, test 0, 35, 70, 105, 140, 280, 560, index of 700 days of function. Rate of reservation of flexural strength of 1.4 function test, curve a model to estimate reservation rate: Flexural strength checks by GB/T 2567-2008, with at first flexural strength ratio estimates reservation rate for intensity, model. Quality reservation leads: Use 4 digit balance to say to take curve sample quality, record initiative cost, alkaline processing is constant after time, finishing clean, say to weigh, computational quality reservation is led. Hardness of Ba Ke Er: Check according to ASTM D2583-2013. Ply: Curve sample to use drawknife, filter paper to corrode the surface the layer to be handled clean via what high temperature lye has immersed, test sample the rest is effective ply. 2 tests result and debate performance of foundation of colophony of 2.1 different types solution of comparative data alkali resistance is caustic concern with stuff kind, experiment purpose is test low ester base density VE and distinction of function of alkali resistance of high temperature of other type colophony, design 4 comparative model, it is tall ester respectively base A of density double phenol VE, mix model, phenolic aldehyde VE, double phenolic A UP, fundamental sex visibility is expressed 1.
