Kakaretso: Tšebeliso ea thepa ea lapenghydroxypropyl methylcelluloseHo e-na le ho kenya e le 'ngoe tlhahisong ea PVC e nang le tekanyo e phahameng ea polymerization ho ile ha hlahisoa. Litlamorao tsa mefuta e 'meli ea hydroxypropyl methylcellulose holim'a thepa ea PVC e nang le tekanyo e phahameng ea polymerization li ile tsa hlahlojoa. Liphetho li bontšitse hore ho ne ho khoneha ho nkela hydroxypropyl methyl cellulose ea lapeng sebaka sa e tsoang kantle ho e 'ngoe.
Li-resin tsa PVC tsa tekanyo e phahameng li bua ka li-resin tsa PVC tse nang le tekanyo e tloaelehileng ea polymerization e fetang 1,700 kapa tse nang le sebopeho se hokahaneng hanyane pakeng tsa limolek'hule, tseo har'a tsona tse tloaelehileng haholo e leng li-resin tsa PVC tse nang le tekanyo e tloaelehileng ea polymerization ea 2,500 [1]. Ha li bapisoa le resin e tloaelehileng ea PVC, resin ea PVC ea polymerization e phahameng e na le matla a phahameng a ho mamella, sete e nyane ea khatello, ho hanyetsa mocheso hantle, ho hanyetsa botsofali, ho hanyetsa mokhathala le ho hanyetsa ho tsofala. Ke sebaka se loketseng sa rabara 'me se ka sebelisoa lithapong tsa ho tiisa likoloi, lithapo le likhoele, li-catheter tsa bongaka, jj. [2].
Mokhoa oa tlhahiso ea PVC o nang le tekanyo e phahameng ea polymerization ke haholo-holo polymerization ea ho emisoa [3-4]. Tlhahisong ea mokhoa oa ho emisoa, qhalanya ke sesebelisoa sa bohlokoa sa thuso, 'me mofuta oa eona le bongata ba eona li tla ama ka kotloloho sebopeho sa likaroloana, kabo ea boholo ba likaroloana, le ho monngoa ha plasticizer ea resin ea PVC e felileng. Mekhoa e sebelisoang haholo ea ho hasanya ke litsamaiso tsa polyvinyl alcohol le litsamaiso tsa hydroxypropyl methylcellulose le polyvinyl alcohol composite dispersion, 'me bahlahisi ba malapeng ba sebelisa haholo-holo ea morao-rao [5].
1 Lisebelisoa tse tala tsa mantlha le litlhaloso
Lisebelisoa tse tala tsa mantlha le litlhaloso tse sebelisitsoeng tekong li bontšitsoe ho Tafole ea 1. Ho ka bonoa ho tsoa ho Tafole ea 1 hore hydroxypropyl methylcellulose ea lapeng e khethiloeng pampiring ena e tsamaellana le hydroxypropyl methylcellulose e tsoang kantle ho naha, e fanang ka tlhoko ea tlhahlobo ea ho nkela sebaka pampiring ena.
2 Dikahare tsa teko
2. 1 Ho lokisa tharollo ea hydroxypropyl methylcellulose
Nka metsi a itseng a hloekisitsoeng, u a kenye ka setshelong 'me u a futhumatse ho fihlela ho 70°C, 'me butle-butle u kenye hydroxypropyl methylcellulose tlas'a ho hlohlelletsa kamehla. Cellulose e phaphamala holim'a metsi qalong, ebe e hasana butle-butle ho fihlela e tsoakane ka ho lekana. Pholisa tharollo ho fihlela e le bophahamo.
Tafole ea 1 Lisebelisoa tse tala tsa mantlha le litlhaloso tsa tsona
| Lebitso la thepa e tala | Tlhaloso |
| Monomer ea vinyl chloride | Sephetho sa boleng≥99. 98% |
| Metsi a hloekisitsoeng letsoai | Ho tsamaisa motlakase≤10. 0 μs/cm, boleng ba pH 5. 00 ho isa ho 9. 00 |
| Joala ba polyvinyl A | Tekanyo ea ho sebelisa joala 78. 5% ho isa ho 81. 5%, tekanyo ea molora ≤0. 5%, taba e feto-fetohang ≤5. 0% |
| Joala ba polyvinyl B | Tekanyo ea ho sebelisa joala 71. 0% ho isa ho 73. 5%, viscosity 4. 5 ho isa ho 6. 5mPa s, volatile matter≤5. 0% |
| Joala ba polyvinyl C | Tekanyo ea ho sebelisa joala 54. 0% ho isa ho 57. 0%, viscosity 800 ~ 1 400mPa s, dikahare tse tiileng 39. 5% ho isa ho 40. 5% |
| Hydroxypropyl methylcellulose A e kentsweng kantle ho naha | Ho thibana ha 40 ~ 60 mPa s, karoloana ea boima ba methoxyl 28% ~ 30%, karoloana ea boima ba hydroxypropyl 7% ~ 12%, mongobo ≤5. 0% |
| Hydroxypropyl methylcellulose B ea lapeng | Ho thibana ha 40 ~ 60 mPa s, karoloana ea boima ba methoxyl 28% ~ 30%, karoloana ea boima ba hydroxypropyl 7% ~ 12%, mongobo ≤5. 0% |
| Bis (2-ethylhexyl peroxydicarbonate) | Karoloana ea boima [(45 ~ 50) ± 1] % |
2. 2 Mokhoa oa teko
Sesebedisweng sa teko se senyenyane sa 10 L, sebedisa hydroxypropyl methyl cellulose e tswang kantle ho naha ho etsa diteko tsa tekanyetso ho fumana foromo ya motheo ya teko e nyane; sebedisa hydroxypropyl methyl cellulose ya lapeng ho nkela hydroxypropyl methyl cellulose e tswang kantle ho naha sebaka bakeng sa diteko; Dihlahiswa tsa resin tsa PVC tse hlahisitsweng ke hydroxypropyl methyl cellulose e fapaneng di bapisitswe ho ithuta kgonahalo ya ho nkela sebaka hydroxypropyl methyl cellulose ya lapeng. Ho ya ka diphetho tsa teko e nyane, teko ya tlhahiso e etswa.
2. Mehato e 3 ea teko
Pele ho karabelo, hlwekisa ketlele ya polymerization, kwala valve e ka tlase, eketsa metsi a itseng a ntshitsweng letsoai, ebe o eketsa dispersant; kwala sekwahelo sa ketlele, o hlwekise ka vacuum cleaner kamora ho feta tekong ya kgatello ya naetrojene, ebe o eketsa vinyl chloride monomer; kamora ho hlohlelletsa ka serame, eketsa se qalang; Sebelisa metsi a potolohang ho phahamisa mocheso ka ketleleng ho ya mochesong wa karabelo, mme o kenye tharollo ya ammonium bicarbonate ka nako e nepahetseng nakong ya tshebetso ena ho lokisa boleng ba pH ba sistimi ya karabelo; ha kgatello ya karabelo e theohela kgatellong e boletsweng foromong, eketsa sethibela-mafu le sethibela-mafu, mme o ntshe metsi Sehlahiswa se fedileng sa resin ya PVC se fumanwe ka ho centrifugation le ho omisa, mme sampolwa bakeng sa tlhahlobo.
2. 4 Mekhoa ea tlhahlobo
Ho ya ka mekgwa e nepahetseng ya teko ho maemo a kgwebo Q31/0116000823C002-2018, palo ya viscosity, bongata bo bonahalang, ntho e fetofetohang (ho kenyeletswa le metsi) le ho monngwa ha plasticizer ya resin ya PVC ya 100 g ya resin e fedisitsweng ya PVC di ile tsa lekoa le ho hlahlojwa; Boholo bo tloaelehileng ba dikarolwana tsa resin ya PVC bo ile ba lekoa; sebopeho sa dikarolwana tsa resin ya PVC se ile sa bonwa ho sebediswa microscope ya elektrone e skenwang.
3 Liphetho le Puisano
3. 1 Tlhahlobo ea papiso ea boleng ba lihlopha tse fapaneng tsa resin ea PVC ho polymerization e nyane
Tobetsa 2. Ho ya ka mokhoa wa teko o hlalositsweng ho 4, sehlopha se seng le se seng sa resin e nyane ya PVC e qetilweng se ile sa lekoa, mme diphetho di bontshitswe ho Tafole ya 2.
Tafole ea 2 liphetho tsa lihlopha tse fapaneng tsa liteko tse nyane
| Sehlopha | Hydroxypropyl methyl cellulose | Bongata bo bonahalang/(g/mL) | Boholo ba karolelano ea likaroloana/μm | Ho thibana/(mL/g) | Ho monya 100 g ea resin ea PVC/g ka polasetiki | Taba e feto-fetohang/% |
| 1# | Kenya | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Kenya | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Kenya | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Lapeng | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Lapeng | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Lapeng | 0.36 | 167 | 194 | 43 | 0.22 |
E ka bonoa ho tsoa ho Tafole ea 2: Bongata bo bonahalang, palo ea viscosity le ho monngoa ha plasticizer ea resin ea PVC e fumanoeng li batla li le haufi ka ho sebelisa cellulose e fapaneng bakeng sa teko e nyane; sehlahisoa sa resin se fumanoeng ka ho sebelisa foromo ea lapeng ea hydroxypropyl methylcellulose Boholo bo tloaelehileng ba likaroloana bo bonyenyane hanyane.
Setšoantšo sa 1 se bontša litšoantšo tsa SEM tsa lihlahisoa tsa resin ea PVC tse fumanoeng ka ho sebelisa hydroxypropyl methylcellulose e fapaneng.
(1)—Hydroxypropyl methylcellulose e kentsweng kantle ho naha
(2)—Hydroxypropyl methylcellulose ea lapeng
Setšoantšo sa 1 SEM sa li-resin tse hlahisoang ka har'a polymerizer ea 10-L ka pel'a cellulose e fapaneng ea hydroxypropyl methyl
Ho ka bonoa ho tsoa ho Setšoantšo sa 1 hore meaho ea bokaholimo ba likaroloana tsa resin tsa PVC tse hlahisoang ke li-dispersant tse fapaneng tsa cellulose e batla e tšoana.
Ha re akaretsa, ho ka bonoa hore hydroxypropyl methylcellulose ea lapeng e lekiloeng pampiring ena e na le monyetla oa ho nkela hydroxypropyl methylcellulose e tsoang kantle ho naha sebaka.
3. 2 Tlhahlobo ea papiso ea boleng ba resine ea PVC e nang le tekanyo e phahameng ea polymerization tekong ea tlhahiso
Ka lebaka la litšenyehelo tse phahameng le kotsi ea teko ea tlhahiso, morero o felletseng oa ho nkela sebaka oa teko e nyane o ke ke oa sebelisoa ka kotloloho. Ka hona, morero oa ho eketsa butle-butle karolo ea hydroxypropyl methylcellulose ea lapeng ka mokhoa o sebelisitsoeng oa amoheloa. Liphetho tsa liteko tsa sehlopha ka seng li bontšitsoe ho Tafole ea 3.
Tafole ea 3 Liphetho tsa liteko tsa lihlopha tse fapaneng tsa tlhahiso
| Sehlopha | M (hydroxypropyl methyl cellulose ea lapeng): M (hydroxypropyl methyl cellulose e tsoang kantle ho naha) | Bongata bo bonahalang/(g/mL) | Palo ea ho thibana/(mL/g) | Ho monya 100 g ea resin ea PVC/g ka polasetiki | Taba e feto-fetohang/% |
| 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 |
Ho ka bonoa ho tsoa Tafoleng ea 3 hore tšebeliso ea hydroxypropyl methylcellulose ea lapeng e ile ea eketseha butle-butle ho fihlela lihlopha tsohle tsa hydroxypropyl methylcellulose ea lapeng li nkela hydroxypropyl methylcellulose e tsoang kantle ho naha sebaka. Matšoao a mantlha a kang ho monngoa ha plasticizer le bongata bo bonahalang ha aa ka a fetoha haholo, ho bontša hore hydroxypropyl methylcellulose ea lapeng e khethiloeng pampiring ena e ka nka sebaka sa hydroxypropyl methylcellulose e tsoang kantle ho naha tlhahisong.
4 Qetello
Teko ea lapenghydroxypropyl methyl celluloseSesebedisweng se senyenyane sa teko sa 10 L se bontsha hore se na le monyetla wa ho nkela hydroxypropyl methyl cellulose e tswang kantle ho naha sebaka; diphetho tsa teko ya ho nkela tlhahiso sebaka di bontsha hore hydroxypropyl methyl cellulose ya lapeng e sebedisetswa tlhahiso ya resin ya PVC, matshwao a bohlokwa a boleng ba resin ya PVC e fedisitsweng le hydroxypropyl methyl cellulose e tswang kantle ho naha ha a na phapang e kgolo. Hona jwale, theko ya cellulose ya lapeng mmarakeng e tlase ho feta ya cellulose e tswang kantle ho naha. Ka hona, haeba cellulose ya lapeng e sebediswa tlhahisong, ditjeo tsa tlhahiso di ka fokotswa haholo.
Nako ea poso: Mmesa-25-2024