EN
polyvinyl cawv (pva) - sinopec
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
lub cev muaj zog:
- solubility: polyvinyl cawv hmoov tuaj yeem yaj hauv dej. polyvinyl cawv resin (pva) nrog rau qib ntawm alcoholysis tsawg dua 95% tuaj yeem yaj hauv dej ntawm chav tsev kub, thiab polyvinyl cawv resin (pva) nrog qib ntawm alcoholysis ntau dua 99.5% tsuas yog yaj hauv dej kub saum toj no. 95 ℃.
- thermal stability: polyvinyl cawv yuav soften thaum rhuab, tsis muaj kev hloov pauv hauv qab 40 ℃, siab dua 160 ℃, nws yuav maj mam xim thaum rhuab mus ntev, thiab decompose saum 220 ℃ los tsim dej, acetic acid, acetaldehyde thiab crotonaldehyde.
- tshuaj tiv thaiv: pva tsis tshua muaj kev cuam tshuam los ntawm cov kua qaub tsis muaj zog, lub hauv paus tsis muaj zog lossis cov kuab tshuaj organic, thiab nws cov roj ua haujlwm siab heev.
- cia ruaj khov: pva yog cov viscosity tsawg polymer, nws cov kua aqueous ruaj khov heev ntawm chav tsev kub. aqueous daws tsis deteriorate thaum lub sij hawm cia.
- zaj duab xis forming: vim lub siab adhesion ntawm pva molecules, pva yog ib qho yooj yim los tsim films, cov zaj duab xis tsim yog tsis muaj xim thiab pob tshab, muaj zoo mechanical zog, du nto thiab tsis nplaum, zoo solubility kuj. molecular zaj duab xis muaj lub teeb pom kev zoo, siab noo noo permeability, tsis muaj nqi, tsis muaj plua plav sau thiab luam ntawv zoo.
chemical khoom:
pva tuaj yeem suav tau tias yog cov kab hluav taws xob linear nrog cov pab pawg hydroxyl theem nrab. pawg hydroxyl nyob rau hauv cov molecule muaj kev ua haujlwm siab thiab tuaj yeem ua cov tshuaj lom neeg tsis tshua muaj cawv, xws li esterification, etherification, acetalization, thiab lwm yam, thiab tuaj yeem ua rau muaj ntau cov tshuaj inorganic lossis organic compounds.
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
khaws cia rau hauv qhov chaw qhuav, zoo-ventilated ntawm chav tsev kub 5-30 ℃. tsis txhob mus ze qhov chaw kub, tiv thaiv cov av noo, tsis txhob raug tshav ntuj. Nws yog txwv tsis pub khaws cia ua ke nrog cov tshuaj volatile los tiv thaiv adsorption deterioration.
packing cim
pva cov khoom ntim yuav tsum muaj cov cim meej thiab ruaj khov qhia cov khoom npe, qauv, qib, batch naj npawb, net hnyav, chaw tsim khoom npe thiab chaw nyob.
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.
