Abstract: ʻO ka hoʻohana ʻana i ka homehydroxypropyl methylcellulosema kahi o ka lawe ʻia ʻana o kekahi i ka hana ʻana o PVC me ke kiʻekiʻe polymerization kiʻekiʻe i hoʻokomo ʻia. Ua noiʻi ʻia nā hopena o nā ʻano hydroxypropyl methylcellulose ʻelua i nā waiwai o PVC me ke degere polymerization kiʻekiʻe. Ua hōʻike ʻia nā hopena i hiki ke hoʻololi i ka hydroxypropyl methyl cellulose home no ka mea i lawe ʻia mai.
ʻO nā resins PVC kiʻekiʻe-o-polymerization e pili ana i nā resins PVC me ka degere awelika o ka polymerization o ka ʻoi aku ma mua o 1,700 a i ʻole me kahi ʻano hoʻohui liʻiliʻi ma waena o nā mole, a ʻo ka mea maʻamau ka resins PVC me ka degere awelika o ka polymerization o 2,500 [1]. Hoʻohālikelike ʻia me ka resin PVC maʻamau, kiʻekiʻe-polymerization PVC resin he kiʻekiʻe kiʻekiʻe, hoʻonohonoho hoʻoemi liʻiliʻi, kūpaʻa wela maikaʻi, kūpaʻa ʻelemakule, kūpaʻa luhi a me ke kūpaʻa ʻaʻahu. ʻO ia ka mea hoʻololi i ka lāʻau lapaʻau maikaʻi a hiki ke hoʻohana ʻia i loko o nā kaula hoʻopaʻa kaʻa, nā uea a me nā kaula, nā catheters lapaʻau, etc. [2].
ʻO ke ʻano hana o PVC me ke kiʻekiʻe kiʻekiʻe o ka polymerization ka nui o ka polymerization hoʻokuʻu [3-4]. I ka hana ʻana i ke ʻano o ka hoʻokuʻu ʻana, ʻo ka dispersant kahi mea kōkua koʻikoʻi, a ʻo kona ʻano a me ka nui e hoʻopili pololei i ke ʻano o ka ʻāpana, ka hāʻawi ʻana i ka nui, a me ka hoʻopili plasticizer o ka resin PVC i hoʻopau ʻia. ʻO nā ʻōnaehana hoʻopuehu maʻamau ka polyvinyl alcohol system a me ka hydroxypropyl methylcellulose a me ka polyvinyl alcohol composite dispersion system, a ʻo nā mea hana hale e hoʻohana nui i ka hope [5].
1 Nā mea waiwai nui a me nā kikoʻī
Hōʻike ʻia nā mea waiwai nui a me nā kikoʻī i hoʻohana ʻia i ka hoʻāʻo ma ka Papa 1. Hiki ke ʻike ʻia mai ka Papa 1 ʻo ka hydroxypropyl methylcellulose home i koho ʻia ma kēia pepa e kūlike me ka hydroxypropyl methylcellulose i lawe ʻia mai, e hāʻawi ana i kahi koi mua no ka hoʻāʻo hoʻololi i kēia pepa.
2 E ho'āʻo i ka ʻike
2. 1 Hoʻomākaukau ʻana i ka solution hydroxypropyl methylcellulose
E lawe i ka nui o ka wai deionized, e hoʻokomo i loko o kahi pahu a wela iā 70 ° C, a hoʻohui mālie i ka hydroxypropyl methylcellulose ma lalo o ka hoʻoulu ʻana mau. E lana ana ka cellulose ma ka wai i ka mua, a laila e hoʻopuehu mālie ʻia a hui like. Hoʻoluʻu i ka hopena i ka leo.
Papa 1 Nā mea waiwai nui a me kā lākou mau kikoʻī
| Ka inoa mea maka | Hōʻike |
| monomer vinyl chloride | Ka helu maikaʻi≥99. 98% |
| ʻO ka wai desalinated | Conductivity≤10. 0 μs/cm, pH waiwai 5. 00 i 9. 00 |
| ʻO ka polyvinyl alcohol A | Degere Alcoholysis 78. 5% a hiki i ka 81. 5%, lehu maʻiʻo≤0. 5%, mea hikiwawe≤5. 0% |
| ʻO ka waiʻona polyvinyl B | Degere waiona 71. 0% i ka 73. 5%, viscosity 4. 5 a hiki i 6. 5mPa s, mea maʻalahi≤5. 0% |
| ʻO ka polyvinyl alcohol C | Degere Alcoholysis 54. 0% a hiki i 57. 0% , viscosity 800 ~ 1 400mPa s, maʻiʻo paʻa 39． 5% a 40. 5% |
| ʻO ka hydroxypropyl methylcellulose A i lawe ʻia mai | Viscosity 40 ~ 60 mPa s, methoxyl nuipa hakina 28% ~ 30%, hydroxypropyl nuipa hakina 7% ~ 12%, moisture ≤5. 0% |
| ʻO ka hydroxypropyl methylcellulose B | Viscosity 40 ~ 60 mPa s, methoxyl nuipa hakina 28% ~ 30%, hydroxypropyl nuipa hakina 7% ~ 12%, moisture ≤5. 0% |
| Bis (2-ethylhexyl peroxydicarbonate) | ʻO ka hakina nui [ (45 ~ 50) ± 1] % |
2. 2 Ke ano hoao
Ma kahi mea ho'āʻo liʻiliʻi 10 L, e hoʻohana i ka hydroxypropyl methyl cellulose i lawe ʻia mai e hana i nā hoʻokolohua benchmark e hoʻoholo i ke kumu kumu o ka hoʻāʻo liʻiliʻi; hoʻohana i ka hydroxypropyl methyl cellulose home e pani ai i ka hydroxypropyl methyl cellulose i lawe ʻia mai no ka hoʻāʻo ʻana; Hoʻohālikelike ʻia nā huahana resin PVC i hana ʻia e nā hydroxypropyl methyl cellulose like ʻole e aʻo i ka hiki ke hoʻololi i ka hydroxypropyl methyl cellulose home. Wahi a nā hopena o ka hoʻāʻo liʻiliʻi, lawe ʻia ka hoʻokolohua hana.
2. 3 Kaʻina hoʻāʻo
Ma mua o ka hopena, hoʻomaʻemaʻe i ka ipu polymerization, pani i ka pahu lalo, hoʻohui i kahi wai desalinated, a laila hoʻohui i ka dispersant; e pani i ke poʻi o ka ipu hao, e hoʻomaʻemaʻe ma hope o ka hoʻāʻo ʻana i ke kaomi nitrogen, a laila hoʻohui i ka monomer vinyl chloride; ma hope o ka hoʻoulu ʻana i ke anuanu, e hoʻohui i ka mea hoʻomaka; E hoʻohana i ka wai kaʻapuni e hoʻonui ai i ka wela o ka ipuhao i ka wela o ka hopena, a e hoʻohui i ka wai ammonium bicarbonate i ka manawa kūpono i kēia kaʻina hana e hoʻoponopono i ka waiwai pH o ka ʻōnaehana pane; ke hāʻule ka hopena i ke kaomi i kuhikuhi ʻia i loko o ke ʻano, hoʻohui i kahi mea hoʻopau a me kahi mea hoʻoheheʻe, a hoʻokuʻu Ua loaʻa ka huahana i hoʻopau ʻia o ka resin PVC ma ka centrifugation a me ka maloʻo ʻana, a hoʻohālikelike ʻia no ka nānā ʻana.
2. 4 Nā ʻano hoʻohālikelike
Wahi a nā ʻano hoʻāʻo kūpono i ka maʻamau ʻoihana Q31/0116000823C002-2018, ka helu viscosity, ʻike ʻike ʻia, nā mea volatile (me ka wai) a me ka plasticizer absorption o 100 g PVC resin o ka resin PVC pau i hoʻāʻo ʻia a nānā ʻia; Ua ho'āʻoʻia ka nui o ka nui o ka PVC resin; ʻike ʻia ka morphology o nā ʻāpana resin PVC me ka hoʻohana ʻana i kahi microscope electron scanning.
3 Nā hualoaʻa a me ke kūkākūkā
3. 1 Hoʻohālikelike hoʻohālikelike i ka maikaʻi o nā ʻāpana like ʻole o ka resin PVC i ka polymerization liʻiliʻi
Paʻi 2. E like me ke ʻano hoʻāʻo i wehewehe ʻia ma 4, ua hoʻāʻo ʻia kēlā me kēia pūʻulu o ka resin PVC liʻiliʻi i hoʻopau ʻia, a hōʻike ʻia nā hopena ma ka Papa 2.
Papa 2 nā hualoaʻa o nā pūʻulu like ʻole o ka hoʻāʻo liʻiliʻi
| Pūʻulu | Hydroxypropyl methyl cellulose | ʻIke ʻia/(g/mL) | ʻAwelika nui ʻāpana/μm | Viscosity/(mL/g) | Plasticizer absorption o 100 g PVC resin/g | Mea lele/% |
| 1# | Lawe mai | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Lawe mai | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Lawe mai | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | Kuloko | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | Kuloko | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | Kuloko | 0.36 | 167 | 194 | 43 | 0.22 |
Hiki ke ʻike ʻia mai ka Papa 2: ʻO ka mānoanoa ʻike, ka helu viscosity a me ka plasticizer absorption o ka resin PVC i loaʻa e pili kokoke ana me ka hoʻohana ʻana i nā cellulose ʻokoʻa no ka hoʻāʻo liʻiliʻi; ka huahana resin i loaʻa ma ka hoʻohana ʻana i ka ʻano hydroxypropyl methylcellulose home ʻO ka awelika o ka nui o ka ʻāpana he liʻiliʻi iki.
Hōʻike ka 1 i nā kiʻi SEM o nā huahana resin PVC i loaʻa ma ka hoʻohana ʻana i nā hydroxypropyl methylcellulose like ʻole.
(1)—Hydroxypropyl methylcellulose i lawe ʻia mai
(2)—Hydroxypropyl methylcellulose home
Fig. 1 SEM o nā resins i hana ʻia ma 10-L polymerizer i mua o nā hydroxypropyl methyl cellulose like ʻole.
Hiki ke ʻike ʻia mai ka Figure 1 he ʻano like nā ʻano o ka ʻili o nā ʻāpana resin PVC i hana ʻia e nā dispersants cellulose like ʻole.
I ka hōʻuluʻulu ʻana, hiki ke ʻike ʻia i ka hydroxypropyl methylcellulose home i hoʻāʻo ʻia ma kēia pepa i hiki ke hoʻololi i ka hydroxypropyl methylcellulose i lawe ʻia mai.
3. 2 Ka hoʻohālikelike hoʻohālikelike o ka maikaʻi o ka resin PVC me ke degere polymerization kiʻekiʻe i ka hoʻokolohua hana
Ma muli o ke kumukūʻai kiʻekiʻe a me ka pilikia o ka hoʻāʻo ʻana, ʻaʻole hiki ke hoʻopili pololei ʻia ke ʻano hoʻololi piha o ka hoʻāʻo liʻiliʻi. No laila, ua hoʻohana ʻia ke kumumanaʻo o ka hoʻonui ʻana i ka nui o ka hydroxypropyl methylcellulose home i loko o ke ʻano. Hōʻike ʻia nā hopena hoʻāʻo o kēlā me kēia pūʻulu ma ka Papa 3. hōʻike ʻia.
Papa 3 Nā hopena hoʻāʻo o nā pūʻulu hana like ʻole
| Pūʻulu | M (hydroxypropyl methyl cellulose hale):M (hydroxypropyl methyl cellulose i lawe ʻia mai) | ʻIke ʻia/(g/mL) | Helu viscosity/(mL/g) | Plasticizer absorption o 100 g PVC resin/g | Mea lele/% |
| 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 |
Hiki ke ʻike ʻia ma ka Papa 3 ua hoʻonui mālie ʻia ka hoʻohana ʻana i ka hydroxypropyl methylcellulose home a hiki i nā pūʻulu a pau o ka hydroxypropyl methylcellulose home i pani i ka hydroxypropyl methylcellulose i lawe ʻia mai. ʻAʻole i loli nui nā hōʻailona nui e like me ka plasticizer absorption a me ka mānoanoa ʻike, e hōʻike ana i ka hydroxypropyl methylcellulose home i koho ʻia ma kēia pepa hiki ke hoʻololi i ka hydroxypropyl methylcellulose i lawe ʻia mai i ka hana.
4 Ka hopena
ʻO ka ho'āʻo o ka homehydroxypropyl methyl cellulosema kahi mea ho'āʻo liʻiliʻi 10 L e hōʻike ana he hiki ke hoʻololi i ka hydroxypropyl methyl cellulose i lawe ʻia mai; Hōʻike nā hopena ho'āʻo hoʻololi i ka hoʻohana ʻana i ka hydroxypropyl methyl cellulose home no ka hana ʻana i ka resin PVC, ʻaʻohe ʻokoʻa koʻikoʻi nā hōʻailona koʻikoʻi o ka resin PVC a me ka hydroxypropyl methyl cellulose i lawe ʻia. I kēia manawa, ʻoi aku ka haʻahaʻa o ke kumukūʻai o ka cellulose home ma ka mākeke ma mua o ka cellulose i lawe ʻia mai. No laila, inā hoʻohana ʻia ka cellulose home i ka hana ʻana, hiki ke hoʻemi nui ʻia ke kumukūʻai o nā kōkua hana.
Ka manawa hoʻouna: Apr-25-2024