Shallow talk the path of the fluorine Huo rubber resistant to cold

The fluorine Huo rubber is 1 kind from the Huo oxygen key formation lord chain, but Zha chain top imply Gao Ju4 Wu4 of three fluorine alkyl, it of come together a method method with two A Ji Huo rubber likeness, use the wreath form Huo oxygen alkane to open wreath to come together what legal system build.The heat-proof of the fluorine Huo rubber and bear the drugs not equal to other fluorine rubber, but because of it lord the chain imply Huo oxygen key, but side Ji top imply a fluorine atom again, it and have both of advantage, as a result can in-60 ℃ -200 ℃ very the breadth of the temperature district usage, and bear fuel oil function excellent, dissolve bulge to the methyl alcohol small, but weakness is physics machine function ratio other fluorine rubber bad.

Say on the Zong and lead key into the Si-O key, double in the cent the lord the chain or at member side chain top lead into the ether key, can exaltation big member of meek, thus at improvement the fluorine rubber resistant to cold of in the meantime reserve fluorine rubber original of characteristic, but because of price expensive, biggest restriction it application and expansion.Therefore at the time of carrying on changing sex making new fluorine rubber to the member chain, rightness original of the price be lower of a series the fluorine rubber carry on resistant to cold of improvement is also have much of necessity.

The rubber counteract

Counteract fluorine rubber with some in general use rubber, special kind rubber, can improvement fluorine rubber flexibility low, resistant to cold bad, the price expensive etc. weakness, acquire function excellent but the cost lower material.Because of the characteristics of the fluorine rubber oneself structure, make total vulcanization system choice more difficulty, and counteract future reunion part lower possess singly of fluorine rubber characteristic, therefore, domestic outside counteract aspect of research open an exhibition not extensive, among them can exaltation fluorine rubber of counteract of resistant to cold system main have the following a few kind.

The fluorine rubber/fluorine ether rubber counteract

Is improvement fluorine rubber of low temperature function, abroad already in 20 centuries the beginning of 70's synthesize a fluorine ether rubber, its low temperature function compare the fluorine rubber have obvious improvement, such as the Viton GLT fluorine ether the Tg of the rubber compare the fluorine rubber F246 lower about 14 ℃ , but its price be higher.Aviation material institute for research in Peking counteract a technique to counteract a little amount fluorine ether rubber to develop a fluorine rubber FX-13 through a rubber, improvement the resistant to cold of the fluorine rubber, its brittleness temperature can reach-45 ℃ , and other physics the machine function be good.Pass to counteract fluorine ether rubber not only availably improvement the resistant to cold of the fluorine rubber, and its price also ratio fluorine ether the rubber consumedly lower.

The fluorine rubber/B C rubber counteract

2 dollars B C rubber and 3 dollars B C rubber all ability and fluorine rubber carry on counteracting to change sex, the research be more is used for four change of C fluorine rubber sex.Compared with four C fluorine rubbers, B C rubber also has very the chemistry stability of Gao, heat-proof, bear to wait, bear water, bear steam and bear many good characteristic of chemicals' etc., but it of the typical model characteristics is to bear a pole to lie quality function better, and low temperature function superior.The fluorine of four the equal to ethylene member of the C fluorine rubber replace thing and C Xi of total gather a thing, so both are constitute structure of likeness, for both of counteract and providing compatibility foundation.According to the data introduction, counteract four C fluorine rubber and 2 dollars or 3 dollars B C rubber, can the resistant to cold of the exaltation four C fluorine rubber and flexibility, improvement process craft function and lower the cost of material.But because of two of pole differ very big, reasonable solve total mix a thing of total vulcanization is to counteract a successful key.

Fluorine rubber/agreeable the type difference E rubber counteract

Will agreeable type 1, 4-gather difference E the fluorine rubber of two Xi and dissimilarity structures counteract and can used for production rubber to seal completely a piece.In this kind counteract the gum, along with fluorine rubber and difference E rubber counteract ratio of variety, counteract the gum can performance dissimilarity of function.When fluorine rubber the content be low at 50, difference E rubber is continuous mutually counteract gum to have good resistant to cold, but it bear oil more bad, should the weakness can pass an adoption accommodation of vulcanization method(such as dynamic state vulcanization method) take into improvement.Adoption dynamic state vulcanization method, reasonable control counteract gum of bear oil, resistant to cold.

The fluorine rubber/Huo rubber counteract

Huo rubber is member lord chain with-Si-O-key is lord, but the side Ji is for a type of line form polymer of organic Ji regiment(main is A Ji), is 1 kind and have no machine and organic property of the high mark bullet body.Because of the special of its member structure, compared with the other rubber, the Huo rubber have excellent heat-proof, flexibility, resistant to cold, goodly take off a mold, electricity, well ventilated and transmit heat sex, watertightness and good temperature stability.Counteract Huo rubber and fluorine rubber, can acquire and two counteract of characteristic gum, obvious improvement the fluorine rubber resistant to cold and flexibility bad of weakness, such as Japan synthesize a rubber company development of the JSR-JENIXF series fluorine rubber/Huo rubber counteract gum to have good heat-proof, resistant to cold, bear oil and bear water and bear fume, and the price be opposite and lower.

Add the increase of accommodation Su

Increasing a Su is , in the resistant to cold rubber that product a formula design in addition to livinging gum, rightness resistant to cold sex influence biggest of match.Research enunciation, join to increase a Su ability exaltation rubber member chain of gentle, thus improvement vulcanization gum of resistant to cold.General join freezing point to lowerly increase a Su, can lower vulcanization gum of the glass turn temperature;Whereas, if increase the freezing point temperature of Su higher, the glass that then can make vulcanization gluey turn a temperature exaltation.From the exaltation vulcanization the gum resistant to cold of the angle set out and increase a Su of choice, have to be full estimate to increase a Su to turn temperature to the glass of influence.

Increase type and dosage of Su, from the species of rubber and product of resistant to cold sex index sign decision of.Join in the resistant to cold the worse pole the rubber appropriate of increase a Su, pass the pole Ji regiment and the interaction of the pole Ji regiment within chain of the pole rubber member of increase the Su, lowered the pole rubber member the function dint of, make member chain the segment be easy to sport, can acquire better low temperature function thus.But say for the fluorine rubber, because of its member structure height stability, adoption general of increase a Su to have no effect it, besides carry on under 200-250 ℃ two vulcanization of increase a Su in the process will vaporize, so can application in the fluorine rubber of increase a Su category extremely limited:A kind of is the usage low and opposite member quality of contain fluorine alkene total gather a thing, that is fluorine wax, Be the increase of fluorine rubber Su.Such as in the difference E rubber and fluorine rubber counteract the system, if join in advance making of the low mark son increase Su Φ NA(from difference E rubber and fluorine rubber the mechanics decline solution to make in specially the structure of the reactor), obvious then exaltation counteract gum of resistant to cold.Another is the adoption contain the fluorine sour ester and turn such as the fluorine F two sour ester Be the increase of fluorine rubber Su.Should kind increase a Su in order to having in the member structure fluorine, have with fluorine rubber better of close with sex, so can improvement match of dispersion and the gum anticipate of process function, but it of the biggest advantage be under the premise that to vulcanization gum of physics machine function have no obvious influence, can obvious improvement fluorine rubber of resistant to cold, make fluorine rubber product can at-50 ℃ temperature bottom usage.

The vulcanization chosen to use accommodation system

Fluorine rubber the vulcanization system for use currently substantially can is divided into 3 types:An, Fen with organic lead oxide.According to data report way, for three love the F246 series fluorine that enrich company's production rubber, be adoption one vulcanized agent Be vulcanization system, regardless choose to use An, Fen or lead oxide vulcanized agent, to the low temperature function of the fluorine rubber influence all isn't very obvious, difference also not big.For the fluorine rubber species and dissimilarity of dissimilarity of vulcanization system match, and adoption dissimilarity of vulcanization the method influence the fluorine rubber resistant to cold to still treat in further research.

Choose to use fill of accommodation

Generally speaking, join to fill can't obvious change rubber of the glass turn change temperature, fill to influence the rubber resistant to cold and be decided by to fill and the rubber structure become in interaction.Activity Tan black grain of the son and rubber member would formation dissimilarity of physics adsorb key and firm chemistry to adsorb key, meeting in the Tan black grain sub- surface formation living gum of adsorb a layer(interface layer), should function and glass Tai of the interface layer living gum of function very close, restriction member chain of sport, make to be adsorb to living gum of the glass turn temperature ascension, bar chain segment Gou type of change, therefore can't hope to join to fill to improvement fluorine rubber of resistant to cold.

The rightness existing fluorine rubber species carry on resistant to cold sex research, and develop a new resistant to cold good fluorine rubber, for open widely fluorine rubber of application realm, push domestic seal completely business of development, have importance of meaning.