Mahimman kalmomi: hydroxypropyl methyl cellulose; PVC tare da babban digiri na polymerization; ƙananan gwaji; polymerization; gidauniya.
Aikace-aikacen China hydroxypropyl methylcellulosemaimakon shigo da daya zuwa samar da PVC tare da high polymerization digiri aka gabatar. An bincika tasirin nau'ikan nau'ikan hydroxypropyl methylcellulose guda biyu akan kaddarorin PVC tare da babban digiri na polymerization. Sakamakon ya nuna cewa yana yiwuwa a maye gurbin hydroxypropyl methyl cellulose na gida don shigo da shi.
Babban-digiri-na-polymerization na PVC resins yana nufin resins na PVC tare da matsakaicin digiri na polymerization na fiye da 1,700 ko ɗan ƙaramin tsarin haɗin giciye tsakanin kwayoyin halitta. Idan aka kwatanta da talakawa PVC guduro, high-polymerization PVC guduro yana da high resilience, kananan matsawa saitin, mai kyau zafi juriya, tsufa juriya, gajiya juriya da kuma sa juriya. Yana da manufa roba madadin da za a iya amfani da mota sealing tube, waya da na USB, likita catheters, da dai sauransu.
Hanyar samar da PVC tare da babban digiri na polymerization shine yawancin dakatarwa polymerization. A cikin samar da hanyar dakatarwa, mai watsawa shine mahimmin mahimmin taimako, kuma nau'insa da adadinsa zai shafi nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'in nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i nau'i) nau'i-nau'. Tsarukan watsawa da aka saba amfani da su sune tsarin barasa na polyvinyl da tsarin hydroxypropyl methylcellulose da polyvinyl barasa hadadden tsarin watsawa, kuma masana'antun gida galibi suna amfani da na ƙarshe.
1 Babban albarkatun ƙasa da ƙayyadaddun bayanai
Babban kayan albarkatun kasa da ƙayyadaddun bayanai da aka yi amfani da su a cikin gwajin an nuna su a cikin Table 1. Ana iya gani daga Table 1 cewa hydroxypropyl methylcellulose na gida da aka zaba a cikin wannan takarda ya dace da hydroxypropyl methylcellulose da aka shigo da shi, wanda ke ba da buƙatu don gwajin maye gurbin a cikin wannan. takarda.
2 Gwaji abun ciki
2. 1 Shiri na maganin hydroxypropyl methylcellulose
Ɗauki wani adadin ruwan da aka lalatar da shi, a saka shi a cikin akwati kuma a zafi shi zuwa 70 ° C, kuma a hankali ƙara hydroxypropyl methylcellulose a ƙarƙashin motsawa akai-akai. Cellulose yana yawo a kan ruwa da farko, sannan kuma a hankali a tarwatse har sai an gauraye shi daidai. Cool da maganin ƙarar.
Tebur 1 Babban kayan albarkatun kasa da ƙayyadaddun su
| Sunan danyen abu | Ƙayyadaddun bayanai |
| Vinyl chloride monomer | Makin inganci≥99. 98% |
| Ruwan da ba a so | Gudanarwa ≤10. 0 μs/cm, pH darajar 5. 00 zuwa 9. 00 |
| Polyvinyl Alcohol A | Digiri na Alcoholysis 78. 5% zuwa 81. 5%, abun cikin toka≤0. 5%, al'amari maras ƙarfi≤5. 0% |
| Polyvinyl barasa B | Digiri na Alcoholysis 71. 0% zuwa 73. 5%, danko 4. 5 zuwa 6. 5mPa s, m al'amari≤5. 0% |
| Polyvinyl barasa C | Digiri na Alcoholysis 54. 0% zuwa 57. 0%, danko 800 ~ 1 400mPa s, m abun ciki 39. 5% zuwa 40.5% |
| Shigo da hydroxypropyl methylcellulose A | Danko 40 ~ 60mPa s, methoxyl taro juzu'i 28% ~ 30%, hydroxypropyl taro juzu'i 7% ~ 12%, danshi≤5. 0% |
| Na gida hydroxypropyl methylcellulose B | Danko 40 ~ 60mPa · s, methoxyl taro juzu'i 28% ~ 30%, hydroxypropyl taro juzu'i 7% ~ 12%, danshi ≤5. 0% |
| Bis (2-ethyl peroxydicarbonate) hexyl ester) | Yawan juzu'i [(45 ~ 50) ± 1]% |
2.2 Hanyar gwaji
A kan ƙananan na'urar gwaji na 10 L, yi amfani da hydroxypropyl methylcellulose da aka shigo da su don gudanar da gwaje-gwaje na ma'auni don ƙayyade ainihin dabarar ƙaramin gwajin; yi amfani da hydroxypropyl methylcellulose na gida don maye gurbin hydroxypropyl methylcellulose da aka shigo da shi don gwaji; An kwatanta samfuran resin PVC da hydroxypropyl methylcellulose ya samar, kuma an yi nazarin yiwuwar maye gurbin hydroxypropyl methylcellulose na gida. Dangane da sakamakon ƙaramin gwajin, ana yin gwajin samarwa.
2.3 Matakan gwaji
Kafin amsawa, tsaftace tukunyar polymerization, rufe bawul ɗin ƙasa, ƙara wani adadin ruwan da aka cire, sannan ƙara mai rarrabawa; rufe murfin kettle, kwashe bayan an wuce gwajin matsa lamba na nitrogen, sannan ƙara vinyl chloride monomer; bayan sanyi sanyi, ƙara mai farawa; Yi amfani da ruwa mai yawo don ɗaga zafin jiki a cikin kettle zuwa zafin jiki, da kuma ƙara ammonium bicarbonate bayani a daidai lokacin wannan tsari don daidaita ƙimar pH na tsarin amsawa; lokacin da matsin lamba ya faɗi zuwa matsa lamba da aka ƙayyade a cikin dabarar, ƙara mai ƙarewa da mai cire foamer, sannan saki mafita. An samo samfurin da aka gama na resin PVC ta hanyar centrifugation da bushewa, kuma an yi samfurin don bincike.
2. 4 Hanyoyin nazari
Dangane da hanyoyin gwajin da suka dace a cikin ma'auni na kasuwanci, an gwada lambar danko, ƙarancin gani, al'amura masu canzawa (ciki har da ruwa) da kuma ɗaukar filastik na 100 g na resin PVC na ƙãre resin PVC; An gwada matsakaicin girman barbashi na resin PVC; An lura da ilimin halittar ɗan adam na ɓangarori na resin na PVC ta amfani da na'urar microscope na dubawa.
3 Sakamako da Tattaunawa
3. 1 Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwaƙwalwa na PVC ya yi a cikin ƙananan ƙananan polymerization
Latsa 2. Dangane da hanyar gwajin da aka kwatanta a cikin 4, an gwada kowane gunkin resin PVC mai ƙarami, kuma an nuna sakamakon a cikin Table 2.
Table 2 sakamakon batches daban-daban na ƙananan gwaji
| Batch | Hydroxypropyl methylcellulose | Bayyanar yawa/(g/ml) | Matsakaicin girman barbashi/μm | Dankowa/(ml/g) | Filastik sha na 100 g PVC guduro / g | Halin maras nauyi/% |
| 1# | Shigo da | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Shigo da | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Shigo da | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Na gida | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Na gida | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Na gida | 0.36 | 167 | 194 | 43 | 0.22 |
Ana iya gani daga Tebur 2: Ƙirar da aka bayyana, lambar danko da kuma ɗaukar filastik na resin PVC da aka samu yana kusa da amfani da cellulose daban-daban don ƙananan gwaji; da guduro samfurin samu ta amfani da gida hydroxypropyl methylcellulose dabara Matsakaicin girman barbashi ne dan kadan karami.
Hoto 1 yana nuna hotunan SEM na samfuran resin PVC da aka samu ta hanyar amfani da hydroxypropyl methylcellulose daban-daban.
(1) -Shigo da hydroxypropyl methylcellulose
(2) - Hydroxypropyl methylcellulose na cikin gida
siffa. 1 SEM na resins da aka samar a cikin 10-L polymerizer a gaban daban-daban hydroxypropyl methyl cellulose
Ana iya gani daga Hoto na 1 cewa sifofi na ɓangarorin guduro na PVC waɗanda masu rarraba cellulose daban-daban ke samarwa sun yi kama da juna.
A takaice, ana iya ganin cewa hydroxypropyl methylcellulose na cikin gida da aka gwada a cikin wannan takarda yana da yuwuwar maye gurbin hydroxypropyl methylcellulose da aka shigo da shi.
3. 2 Binciken kwatancen ingancin guduro na PVC tare da babban digiri na polymerization a cikin gwajin samarwa
Saboda tsadar farashi da haɗarin gwajin samarwa, ba za a iya amfani da cikakken tsarin maye gurbin ƙaramin gwajin kai tsaye ba, don haka shirin shine a hankali ƙara yawan adadin hydroxypropyl methylcellulose na gida a cikin dabara. Ana nuna sakamakon gwajin kowane rukuni a cikin Tebur 3 da aka nuna.
Table 3 Sakamakon gwaji na batches na samarwa daban-daban
| Batch | m (China hydroxypropyl methyl cellulose): m (shigo da hydroxypropyl methyl cellulose) | Bayyanar yawa/(g/ml) | Lambar danko/(ml/g) | Filastik sha na 100 g PVC guduro / g | Halin maras nauyi/% |
| 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 |
Ana iya gani daga tebur na 3 cewa amfani da hydroxypropyl methyl cellulose na cikin gida yana ƙaruwa a hankali har sai hydroxypropyl methyl cellulose na cikin gida ya maye gurbin hydroxypropyl methyl cellulose da aka shigo da shi gaba ɗaya. Babban alamomi irin su shayar da filastik da ƙima mai yawa ba su canzawa sosai ba, yana nuna cewa hydroxypropyl methylcellulose na gida da aka zaɓa a cikin wannan takarda zai iya maye gurbin hydroxypropyl methylcellulose da aka shigo da shi a cikin samarwa.
4 Kammalawa
Gwajin hydroxypropyl methyl cellulose na cikin gida akan ƙaramin na'urar gwajin 10 L ya nuna cewa yana da yuwuwar maye gurbin hydroxypropyl methyl cellulose da aka shigo da shi; sakamakon gwajin maye gurbin samarwa ya nuna cewa ana amfani da hydroxypropyl methyl cellulose na gida don samar da guduro na PVC, manyan alamun ingancin ƙãrewar guduro na PVC da shigo da hydroxypropyl methyl cellulose ba su da wani gagarumin bambanci. A halin yanzu, farashin cellulose na cikin gida a kasuwa ya yi ƙasa da na cellulose da aka shigo da shi. Don haka, idan ana amfani da cellulose na cikin gida wajen samarwa, ana iya rage farashin kayan agajin da ake samarwa sosai.
Lokacin aikawa: Nov-04-2022