EN
polyvinyl cawv (pva) -sinopec sundy
piav qhia
saib tag
Cov txheej txheem suav nrog cov kauj ruam hauv qab no ntawm: siv cov txheej txheem calcium carbide acetylene thiab lub txaj ruaj khov reactor los tsim cov yas acetate; Kev siv cov yas acetate ua cov khoom siv raw, methanol ua cov kuab tshuaj, azobisisobutyronitrile ua tus thawj coj, siv cov tshuaj dawb radical polymerization hom, thiab siv cov tshuaj anhydrous low-alkali siv alcoholysis hom los tsim polyvinyl cawv; thiab nqa tawm crushing, nias, ziab, ntim thiab lwm yam kom tau txais cov khoom.
cov khoom paub meej
Lub npe tshuaj: polyvinyl cawv (pva)
Cov mis mos molecular: -[ch2ch(oh)]n
packing ceev: 0.4-0.5 g / ml
general khoom:
- solubility: nws yog soluble hauv dej, pob tshab aqueous tov. Nws cov solubility feem ntau yog txiav txim siab los ntawm qib ntawm polymerization thiab alcoholysis. Nrog rau qhov txo qis ntawm alcoholysis degree, cov dej solubility nce thiab qhov kub dissolution txo qhov sib npaug. cov dej solubility yog qhov zoo tshaj plaws thaum lub degree ntawm alcoholysis yog 88%. pva tuaj yeem yaj hauv cov ntsiab lus polar uas muaj pawg hydroxyl (glycerol, ethylene glycol, acetic acid, acetaldehyde, thiab lwm yam), tab sis nws yog ib qho yooj yim rau gel, insoluble nyob rau hauv feem ntau non-polar organic solvents thiab inorganic acids (h.2yog li ntawd4, hcl, thiab lwm yam)
- zaj duab xis-forming zog: pva aqueous tov yog ib qho yooj yim rau daim duab zaj duab xis, zaj duab xis tsim yog tsis muaj xim thiab pob tshab, muaj zoo mechanical zog, thiab muaj ib tug du nto tsis stickiness. Cov yeeb yaj kiab tuaj yeem xa cov dej vapor, tab sis qhov permeability ntawm hydrogen, oxygen, carbon dioxide thiab lwm yam gases tsawg heev, thiab qhov kev hloov ntawm sab nraud kub tsis tshua muaj kev cuam tshuam rau zaj duab xis.
- adhesion: pva aqueous tov tuaj yeem sib txuas nrog fiber ntau, ntoo, ntawv thiab lwm yam ntxeem tau nrog adhesion zoo.
- miscibility: pva thiab starch, pos hniav, hluavtaws cob, cellulose derivatives thiab ntau yam surfactants tuaj yeem miscible thiab muaj kev ruaj ntseg zoo.
- chemical resistance: nyob rau ntawm qhov kub thiab txias, tus nqi ph ntawm pva aqueous tov feem ntau yog li 5-7, viscosity ruaj khov, yuav luag tsis muaj kev cuam tshuam los ntawm qaug zog acid, tsis muaj zog hauv paus lossis organic hnyav (ester, ketone, siab dua cawv, hydrocarbon), roj tsis kam. yog siab heev, tab sis tuaj yeem decomposed los ntawm peroxide xws li h2o2.
- Thaum tshav kub kub tsis kam: pva yog softened los ntawm tshav kub. Thaum rhuab mus rau 130 ~ 140 ℃, nws cov khoom tsis tshua hloov, tsuas yog xim hloov daj. Lub sij hawm ntev cua sov ntawm 160 ℃ darkens xim. Nyob rau ntawm 200 ℃, intermolecular dehydration thiab dej solubility txo. ntawm qhov kub siab tshaj 200 ℃, intramolecular lub cev qhuav dej tshwm sim. ze rau 300 ℃, tag nrho decomposed rau hauv dej, acetic acid, acetaldehyde thiab crotonaldehyde (nyob rau hauv lub sizing qhuav txheej txheem tsis muaj kev phiv).
- colour rendering: pva tuaj yeem hnov mob nrog dyes congo liab, iodine, tooj liab hydroxide, boric acid thiab ntsev los tsim molecular adducts, uas tuaj yeem siv los txheeb xyuas qhov desizing thiab tu degree thiab paub qhov txawv pva nrog txawv alcoholysis degree.
Cov ntsiab lus ntawm cov khoom
|
yam |
hydrolysis (mol%) |
viscosity (mpa.s) |
tsis hloov pauv (% ≤) |
tshauv (% ≤) |
ph (tus nqi) |
|
086-03 : kuv |
85.0-87.0 Nws |
3.4-4.2 |
≤5.0 |
≤0.4 |
5 ~ 7 |
|
088-05 : kuv |
87.0-89.0 Nws |
4.5-6.0 Nws |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
098-05 : kuv |
98.0-99.0 Nws |
5.0-6.5 |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
088-08 : kuv |
87.0-89.0 Nws |
8.0-10.0 Nws |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
098-08 : kuv |
98.0-99.0 Nws |
9.0-11.0 Nws |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
088-20 : kuv |
87.0-89.0 Nws |
20.5-24.5 Nws |
≤5.0 |
≤0.4 |
5 ~ 7 |
|
092-20 : kuv |
91.0-93.0 Nws |
21.0-27.0 Nws |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
094-27 : kuv |
94.0-96.0 Nws |
22.0-28.0 Nws |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
096-27 : kuv |
96.0-98.0 Nws |
23.0-29.0 Nws |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
100-27 : kuv |
99.0-100.0 Nws |
22.0-28.0 Nws |
≤5.0 |
≤0.7 |
5 ~ 7 |
|
088-35 : kuv |
87.0-89.0 Nws |
29.0-34.0 Nws |
≤5.0 |
≤0.3 |
5 ~ 7 |
|
092-35 : kuv |
91.0-93.0 Nws |
30.0-36.0 Nws |
≤5.0 |
≤0.3 |
5 ~ 7 |
|
100-35 : kuv |
99.0-100.0 Nws |
35.0-43.0 Nws |
≤5.0 |
≤0.7 |
5 ~ 7 |
|
088-50 : kuv |
87.0-89.0 Nws |
45.0-55.0 Nws |
≤5.0 |
≤0.3 |
5 ~ 7 |
|
098-60 : kuv |
98.0-99.0 Nws |
58.0-68.0 Nws |
≤5.0 |
≤0.5 |
5 ~ 7 |
|
100-60 |
99.0-100.0 Nws |
58.0-68.0 Nws |
≤5.0 |
≤0.7 |
5 ~ 7 |
|
100-70 |
99.0-100.0 Nws |
68.0-78.0 Nws |
≤5.0 |
≤0.7 |
5 ~ 7 |
pob khoom
20 kg / hnab, 25 kg / hnab.
khaws cia
pva yuav tsum tau muab cia rau hauv qhov chaw qhuav, zoo-ventilated ntawm chav tsev kub 5-30 ℃. tsis txhob mus ze qhov chaw tshav kub, tiv thaiv ya raws, tsis txhob raug tshav ntuj. Nws yog txwv tsis pub khaws cia ua ke nrog cov tshuaj volatile los tiv thaiv adsorption deterioration.
kev thauj mus los
pva cov khoom yuav tsum raug thauj nrog cov tsheb thauj mus los huv si kom tsis txhob ya raws, nag thiab hnub ci. tuav lawv maj mam kom tsis txhob khawb lossis tawg lub pob.
Cov ntsiab lus txaus ntshai
Kev phom sij rau kev noj qab haus huv: tsim kev puas tsuaj los ntawm kev nqus, nqus los yog nqus los ntawm daim tawv nqaij, khaus qhov muag thiab tawv nqaij.
explosion txaus ntshai: cov khoom no yog flammable thiab irritating.
kev pab thawj zaug
Kev sib cuag ntawm daim tawv nqaij: tshem cov khaub ncaws tsis huv thiab yaug nrog dej ntws.
Kev sib cuag qhov muag: nqa daim tawv muag thiab yaug nrog cov dej huv huv lossis cov dej ntsev ib txwm thiab tau txais kev kho mob.
inhalation: tawm ntawm qhov chaw mus rau huab cua ntshiab. thaum muaj mob dyspnea, muab cov pa oxygen thiab mus kho mob.
Kev noj haus: haus dej sov txaus kom ntuav thiab mus ntsib kws kho mob.
kev tiv thaiv hluav taws
Cov yam ntxwv txaus ntshai: hmoov thiab huab cua tuaj yeem tsim qhov sib xyaw tawg, thaum ncav cuag ib qho kev xav tau, nws yuav tawg thaum lub txim taws. decompose rau cua sov kom tsim tau cov roj gases.
extinguishing tus neeg sawv cev: dej, ua npuas ncauj, qhuav hmoov, carbon dioxide thiab xuab zeb av.
