Mazwi akakosha: hydroxypropyl methyl cellulose; PVC ine yakakwirira polymerization dhigirii; small experiment; polymerization; localization.
Kushandiswa kweChina hydroxypropyl methylcellulosepachinzvimbo chekuendesa kunze kune imwe kugadzirwa kwePVC ine yakakwirira polymerization degree yakaunzwa. Mhedzisiro yemhando mbiri dzehydroxypropyl methylcellulose pane zvivakwa zvePVC ine yakakwira polymerization degree yakaongororwa. Mhedzisiro yacho yakaratidza kuti zvaigoneka kutsiva yemumba hydroxypropyl methyl cellulose kune inotengeswa kunze kwenyika.
Yakakwira-dhigirii-ye-polymerization PVC resin inoreva maPVC resin ane avhareji dhigirii yepolymerization inodarika 1,700 kana chidimbu-chakabatana chimiro pakati pemamorekuru. Kana ichienzaniswa neyakajairika PVC resin, yakakwirira-polymerization PVC resin ine yakakwirira kusimba, diki compression set, yakanaka kupisa kupisa, kuchembera kuramba, kuneta kuramba uye kupfeka kuramba. Iyo yakanakira rabha inotsiva uye inogona kushandiswa mumotokari yekuisa chisimbiso mitsetse, waya uye tambo, ekurapa catheter, nezvimwe.
Iyo nzira yekugadzira yePVC ine yakakwira dhigirii yepolymerization inonyanya kumisa polymerization. Mukugadzira nzira yekumisa, iyo inoparadzira chinhu chakakosha chekubatsira mumiriri, uye mhando uye huwandu hwayo zvinokanganisa zvakananga chimiro chechidimbu, particle size distribution, uye plasticizer kunyura kweyakapedzwa PVC resin. Iyo inowanzo shandiswa yekuparadzira masisitimu ndeye polyvinyl doro masisitimu uye hydroxypropyl methylcellulose uye polyvinyl doro composite dispersion masisitimu, uye vagadziri vepamba vanowanzo shandisa iyo yekupedzisira.
1 Main raw materials uye zvakatemwa
Iyo huru yakasvibirira uye zvirevo zvakashandiswa mukuedzwa zvinoratidzwa muTable 1. Inogona kuonekwa kubva paTebhu 1 kuti yepamba hydroxypropyl methylcellulose yakasarudzwa mupepa rino inopindirana neiyo kunze kwenyika hydroxypropyl methylcellulose, iyo inopa chinodiwa chekutsiva bvunzo mune ino. bepa.
2 Test content
2. 1 Kugadzirira kwehydroxypropyl methylcellulose solution
Tora imwe mvura yakasvibiswa, uiise mumudziyo uye inopisa kusvika ku70 ° C, uye zvishoma nezvishoma uwedzere hydroxypropyl methylcellulose pasi pekukurudzira nguva dzose. Iyo cellulose inoyangarara pamusoro pemvura pakutanga, uye inozopararira zvishoma nezvishoma kusvika yasanganiswa zvakaenzana. Kutonhodza mhinduro kuhuwandu.
Tafura 1 Main raw materials uye maitiro avo
| Raw material zita | Tsanangudzo |
| Vinyl chloride monomer | Chibodzwa chemhando≥99. 98% |
| Desalinated water | Conductivity≤10. 0 μs/cm, pH kukosha 5. 00 kusvika 9. 00 |
| Polyvinyl doro A | Doro dhigirii 78. 5% kusvika 81. 5%, madota emukati≤0. 5%, inoshanduka nyaya≤5. 0% |
| Polyvinyl doro B | Dhigirii reAlcoholysis 71. 0% kusvika 73. 5%, viscosity 4. 5 kusvika 6. 5mPa s, volatile matter≤5. 0% |
| Polyvinyl doro C | Dhigirii redoro 54. 0% kusvika 57. 0%, viscosity 800 ~ 1 400mPa s, yakasimba yemukati 39. 5% kusvika 40.5% |
| Yakatorwa kunze kwenyika hydroxypropyl methylcellulose A | Viscosity 40 ~ 60 mPa s, methoxyl mass fraction 28% ~ 30%, hydroxypropyl mass fraction 7% ~ 12%, mwando≤5. 0% |
| Mumba hydroxypropyl methylcellulose B | Viscosity 40 ~ 60 mPa · s, methoxyl mass fraction 28% ~ 30%, hydroxypropyl mass fraction 7% ~ 12%, mwando ≤5. 0% |
| Bis(2-ethyl peroxydicarbonate) hexyl ester) | Chikamu chikuru [( 45 ~ 50) ± 1]% |
2. 2 Nzira yekuedza
Pa 10 L diki bvunzo mudziyo, shandisa kunze kwenyika hydroxypropyl methylcellulose kuita mabenchmark bvunzo kuona yakakosha formula yebvunzo diki; shandisa yemumba hydroxypropyl methylcellulose kutsiva kunze kwenyika hydroxypropyl methylcellulose yekuyedza; Zvigadzirwa zvePVC resin zvinogadzirwa nehydroxypropyl methylcellulose zvakaenzaniswa, uye kugona kwekutsiva yemumba hydroxypropyl methylcellulose kwakadzidzwa. Zvinoenderana nemhedzisiro yebvunzo diki, bvunzo yekugadzira inoitwa.
2. 3 Matanho ekuedza
Pamberi pekuita, chenesa kettle yepolymerization, vhara valve yepasi, wedzera imwe mvura yakasvibiswa, uye wobva wawedzera dispersant; vhara kettle chivharo, vacuum mushure mokupfuura nitrogen pressure test, wobva wawedzera vinyl chloride monomer; mushure mekutonhora kunotonhora, wedzera initiator; Shandisa mvura inotenderera kukwidza tembiricha muketero kusvika kune tembiricha yekupindura, uye wedzera ammonium bicarbonate solution panguva yakakodzera panguva iyi kugadzirisa pH kukosha kweiyo reaction system; apo maitiro ekumanikidza anodonha kumanikidziro anotsanangurwa mufomula, wedzera terminator uye defoamer, uye sunungura mhinduro. Chigadzirwa chakapedzwa chePVC resin chakawanikwa necentrifugation uye kuomeswa, uye sampuli yekuongorora.
2. 4 Analysis nzira
Zvinoenderana neakakodzera nzira dzekuyedza mune bhizinesi chiyero, iyo viscosity nhamba, inooneka density, inovhuvhuta nyaya (inosanganisira mvura) uye plasticizer kunyudzwa kwe100 g PVC resin yeyakapera PVC resin yakaedzwa uye yakaongororwa; Ivhareji yehukuru hwePVC resin yakaedzwa; morphology yePVC resin particles yakaonekwa pachishandiswa scanning electron maikorosikopu.
3 Migumisiro uye Kukurukurirana
3. 1 Kuenzanisa ongororo yemhando yemhando dzakasiyana dzePVC resin mune diki-scale polymerization.
Dhinda 2. Maererano nekuedza nzira inotsanangurwa mu4, batch imwe neimwe yediki-yakapedzwa PVC resin yakaedzwa, uye mhedzisiro inoratidzwa muTebhu 2.
Tafura 2 mhedzisiro yemabhechi akasiyana ediki bvunzo
| Batch | Hydroxypropyl methylcellulose | Kuwanda kuri kuita/(g/mL) | Avhareji yekukura kwechidimbu/μm | Viscosity/(mL/g) | Plasticizer absorption ye100 g PVC resin/g | Zvinhu zvakasiyana-siyana/% |
| 1# | Import | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Import | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Import | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Zvemumba | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Zvemumba | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Zvemumba | 0.36 | 167 | 194 | 43 | 0.22 |
Inogona kuonekwa kubva kuTable 2: Iyo inooneka density, viscosity nhamba uye plasticizer absorption yeakawanikwa PVC resin iri pedyo nekushandisa cellulose yakasiyana yekuedza kuduku; iyo resin chigadzirwa chakawanikwa nekushandisa yemumba hydroxypropyl methylcellulose formula Iyo yepakati particle size idiki zvishoma.
Mufananidzo 1 unoratidza mifananidzo yeSEM yePVC resin zvigadzirwa zvakawanikwa nekushandisa zvakasiyana hydroxypropyl methylcellulose.
(1)—Imported hydroxypropyl methylcellulose
(2)—Domestic hydroxypropyl methylcellulose
Fig. 1 SEM yemaresini anogadzirwa mu10-L polymerizer pamberi peyakasiyana hydroxypropyl methyl cellulose.
Inogona kuonekwa kubva kuMufananidzo 1 kuti zvimiro zvepamusoro zvePVC resin particles inogadzirwa nemhando dzakasiyana dze cellulose dispersants dzakafanana.
Kupfupisa, zvinogona kuoneka kuti iyo yemumba hydroxypropyl methylcellulose yakaedzwa mubepa rino ine mukana wekutsiva kunze kwenyika hydroxypropyl methylcellulose.
3. 2 Kuenzanisa kuongororwa kwemhando yePVC resin ine dhigirii yepamusoro yepolymerization mukuedzwa kwekugadzira
Nekuda kwemutengo wakakwira uye njodzi yekuyedzwa kwekugadzira, iyo yakazara yekutsiva chirongwa chediki bvunzo haigone kushandiswa zvakananga, saka chirongwa ndechekuwedzera zvishoma nezvishoma chikamu chemumba hydroxypropyl methylcellulose mufomula. Miedzo yebatch yega yega inoratidzwa muTafura 3 inoratidzwa.
Tafura 3 Miedzo mibairo yemabhechi akasiyana ekugadzira
| Batch | m (China hydroxypropyl methyl cellulose): m (imported hydroxypropyl methyl cellulose) | Kuwanda kuri kuita/(g/mL) | Viscosity nhamba/(mL/g) | Plasticizer absorption ye100 g PVC resin/g | Zvinhu zvakasiyana-siyana/% |
| 0# | 0:100 | 0.45 | 196 | 36 | 0.12 |
| 1# | 1.25:1 | 0.45 | 196 | 36 | 0.11 |
| 2# | 1.25:1 | 0.45 | 196 | 36 | 0.13 |
| 3# | 1.25:1 | 0.45 | 196 | 36 | 0.10 |
| 4# | 2.50:1 | 0.45 | 196 | 36 | 0.12 |
| 5# | 2.50:1 | 0.45 | 196 | 36 | 0.14 |
| 6# | 2.50:1 | 0.45 | 196 | 36 | 0.18 |
| 7# | 100:0 | 0.45 | 196 | 36 | 0.11 |
| 8# | 100:0 | 0.45 | 196 | 36 | 0.17 |
| 9# | 100:0 | 0.45 | 196 | 36 | 0.14 |
Zvinogona kuoneka kubva Tafura 3 kuti kushandiswa kwemumba hydroxypropyl methyl cellulose kunowedzera zvishoma nezvishoma kudzamara iyo yemumba hydroxypropyl methyl cellulose yatsiva zvachose iyo inotengeswa kunze kwenyika hydroxypropyl methyl cellulose. Zviratidzo zvikuru zvakadai seplasticizer absorption uye density inooneka haina kushanduka zvakanyanya, zvichiratidza kuti iyo yemba hydroxypropyl methylcellulose yakasarudzwa mubepa rino inogona kutsiva iyo inotengeswa kunze kwenyika hydroxypropyl methylcellulose mukugadzira.
4 Mhedziso
Muedzo wemumba hydroxypropyl methyl cellulose pane 10 L diki bvunzo mudziyo inoratidza kuti ine mukana wekutsiva kunze kwenyika hydroxypropyl methyl cellulose; dhizaini yekutsiva bvunzo mhinduro inoratidza kuti yemumba hydroxypropyl methyl cellulose inoshandiswa pakugadzira PVC resin, iyo huru yemhando yezviratidzo zvekupedzwa kwePVC resin uye kunze kwenyika hydroxypropyl methyl cellulose haina mutsauko wakakura. Parizvino, mutengo wemumba cellulose mumusika wakaderera pane wekunze cellulose. Naizvozvo, kana cellulose yemumba ikashandiswa mukugadzira, mutengo wezvigadzirwa zvekugadzira unogona kuderedzwa zvakanyanya.
Nguva yekutumira: Nov-04-2022