Main function
Performance of all sorts of 1 vinyl ester colophony are comparative
The function after the liquid state that expresses the breed of vinyl ester colophony with listed and main 9-7 and mould body solidify and double phenolic A turn over Ding Xi resinous of 2 acerbity polyester all sorts of performance are comparative. See by the data in expressing 9-7, function difference is bigger between the vinyl ester colophony of different breed, ask in the light of different use and design commonly. Turn over Ding Xi compared with double phenolic A for 2 acerbity polyester, congeneric be able to bear or endure chemical colophony, vinyl ester colophony not only be able to bear or endure polyester of chemical sex excel, and each mechanical function and heat-resisting function exceed polyester possibly also. In shape on craft, vinyl ester absorbed the advantage that not saturated polyester facilitates solidify shapes, can adopt same cross-linking solidify technology to shape, showed the advantage with vinyl ester clear colophony thereby. 2 viscosityViscosity of vinyl ester resinous is the main function in use craft, different temperature is very big to viscosity influence. Changing the accretion of thinner to measure is to adjust the main method of viscosity. Join touch change the measure that additive is requirement of contented and special viscosity. The influence that just faces viscosity of vinyl ester colophony with respect to these 3 below explains as follows respectively. (Viscosity of the resinous when 1) temperature is elevatory to the influence temperature of colophony viscosity drops, but descendent speed has distinct change in the from beginning to end that adds styrene. Before adding styrene, viscosity follows the rise of temperature and drop faster; After joining styrene, viscosity changes along with temperature a bit hasten is gently. The viscosity of vinyl ester resinous that graph 9-2 is a model - temperature curve. See from graph 9-2, the temperature before adding styrene differs 15 ~ 20 ℃ , viscosity can change 10 times the left and right sides; After joining styrene, the influence that temperature changes to viscosity is sensitive still also.
(2) thinner joins different thinner to have distinct effect to resinous viscosity to the influence of colophony viscosity. Pith wears what thinner adds a capacity to increase, colophony viscosity drops quickly. Graph 9-3 is styrene and adjacent benzene 2 formic acid the dosage of ester of 2 Xi third changes the influence of the viscosity of vinyl ester colophony to the model. See by graph 9-3, the span of viscosity of the colophony after adding thinner is very big. Increase styrene quantity to be able to make viscosity is reduced, can accommodate more filling, and soak fibre glass quickly, if ask to be able to bear or endure chemical sex is stronger, should increase styrene concentration appropriately [about 50 % (quality mark) ] , the resinous after such solidify sex of acid-proof, alkali resistance is stronger; When styrene density is low, solvent resistance is stronger. (3) is touched change additive asks to have to colophony to the influence of viscosity when touching denaturation, can join active 2 oxidation silicon. Meanwhile, can cooperate to add polarity additive again (like glycerine) , can increase to be touched formerly change the effect. Watch 9-8 changes to touch the additive influence to viscosity the effect. The row in expressing 9-8 has colophony of 3 kinds of vinyl ester, kind the paste that it is a hand, eject and fiber are twined wait for place to use resin; The 2nd kind changes for agnate tall viscosity model colophony; The 3rd kind changes for taller viscosity model colophony. These 3 kinds of colophony are not being added touch change the viscosity when additive is very low, join active the viscosity after 2 oxidation silicon but substantially heighten, join minim glycerine to be able to make viscosity rises again 1 times the left and right sides, more even.
3 outspread rate add up to the influence of material function to the layer
Vinyl ester colophony has tall extensibility. This kind of character adds up to the influence of goods function to the layer, there is very great sense in be used actually. Undertake introductory from 3 respects below, contrast namely different colophony is in pull down load, second the percentage elongation when occurrence craze; In concussion load falls, second the wallop when occurrence opposite ruptures; Hydraulic in the canal below, the pressure when second leakage. ① is in pull down load, second the circumstance of percentage elongation contrast when occurrence craze sees watch 9-9. In expressing 9-9, listed colophony of two kinds of vinyl ester and percentage elongation of resinous of two kinds of polyester reach his of layer plywood press case of meet an emergency, extensibility of vinyl ester resinous is particularly good it is thus clear that.
② falls in concussion load, second the wallop contrast when occurrence opposite ruptures sees watch 9-10.
③ is hydraulic in the canal below, the pressure contrast when second leakage sees watch 9-11.
See by above data, vinyl ester colophony has tall extensibility, the function that combines product to of all kinds layer offerred good condition, the impact resistance to plank and the compression that provide material and prevent leakage ability very advantageous. Vinyl ester colophony also puts in a few defect in using actually: By the tall caking property that place of annulus oxygen framework produces, make colophony is stuck easily on the mould; Reactivity of Shuang Jian of endmost of colophony element catenary is very strong, make colophony is hard to stabilize, should achieve be being carried and it is more long-term stability, more difficult in keep in storage to do not hamper the solidify craft when using is again. Place of vinyl ester colophony uses raw material price tall, when manufacturing technology needs longer, its price compares reason general polyester colophony is expensive, can use at the requirement only the circumstance of superior performance. Vinyl ester colophony the colophony of polyester of caking property excel that waits for material to stainless steel, aluminium, but still not as good as epoxy resin. After using balata modified, caking property gets improvement, have good impact resistance again at the same time. Chloric base modified resin also has ester of formic acid second good caking property. Vinyl ester resin is used in SMC in, use alkaline-earth metal oxide and resinous besides what use extensively end radical or side base generation of carboxylic acid reaction is stiff turn the result beyond, developed new method again, use namely get together salt of different cyanic acid and multivariate mellow reaction in order to produce reticulate structure, achieve resinous stiff change, its are stiff change rate splitting, layer plywood intensity also has rise. Ester colophony can raise the vinyl of phenolic aldehyde varnish that bromine changes resinous anti-flammability, have the corrosion resistance of pair of organic dissolvent and ageing resistance again at the same time. This kind of new breed already was used at extracting uranous manufacturing process from inside thick phosphoric acid and cupreous gangue, because heat-resisting ageing sex is strong, also can make high temperature resistant the chimney of conduit and power plant, cold storage plant. At present vinyl ester colophony basically is used at anti-corrosive, onshore reach carry on regret, the respect such as electric insulation and radiation solidify craft. In chemical industry in the application of anticorrosive equipment, vinyl ester colophony sex of acid-proof, alkali resistance is good. The side hydroxyl on colophony element is good to fibre glass caking property, osmotic good, provided good protection to fibre glass consequently, can develop the property with its high intensity adequately, prevented the defect with scant corrosion resistance again. Add colophony outspread rate is high, tenacity is good, decreased to carry, the injury in installing a process, better than effect of other resinous application, can make chemical industry use groovy canister, conduit, container, case, chimney, absorb tower, syringe to wait, application is wider. For example pulp mill is made with vinyl ester colophony, the syringe of 2 oxidation sulfur of diametical 4.17m, tall 30.5m, can use for a long time below 82 ℃ . Smeltery is useful and flame retardant the chimney that vinyl ester colophony makes diametical 3.43m, tall 122m, with 13.7m long fiber twines tubal splice to rise outfit in cement chimney, the nondestructive in installation hurts break, use 7 years in good condition still. The product that with vinyl of oxygen of annulus of phenolic aldehyde varnish ester colophony makes has good corrosion resistance, solvent resistance to reach high temperature resistant quality. The equipment that makes with its is used below 172 ℃ already amounted to 10 years of above. The respect application such as the groovy canister in industrial waste water and the contaminant that contain hydrochloric acid, conduit is very wide also, for example large anti-corrosive trailer chamfer canister, wall is made with this kind of colophony namely, the wall is used outside flame retardant colophony, use result is favorable. Make the structural member of all sorts of car, for example car tire uses high strenth vinyl successfully ester colophony suppress, greener than river of metallic tire quality % of 40 % ~50. In electric machinery equipment, can run above 10 years continuously below 160~200 ℃ , maintain enough mechanical property and dimension stability. Other increase like the fiber of commonly used Kevlar such as a light boat of boat of maritime high speed in order to reduce quality, raise intensity to reach prevent osmotic.