Kugwiritsa Ntchito Domestic Hydroxypropyl Methyl Cellulose Popanga High Polymerization Digiri ya Polyvinyl Chloride

Ndemanga: Kugwiritsa ntchito zapakhomohydroxypropyl methylcellulosem'malo kunja wina kupanga PVC ndi mkulu polymerization digiri unayambitsidwa. Zotsatira za mitundu iwiri ya hydroxypropyl methylcellulose pazabwino za PVC yokhala ndi digiri yapamwamba ya polymerization zidafufuzidwa. Zotsatira zake zidawonetsa kuti zinali zotheka kulowetsa m'malo mwa hydroxypropyl methyl cellulose m'malo otumizidwa kunja.

High-degree-of-polymerization PVC resins imatanthawuza ma resins a PVC okhala ndi digiri ya polymerization yopitilira 1,700 kapena yokhala ndi mawonekedwe olumikizana pang'ono pakati pa mamolekyu, omwe amapezeka kwambiri ndi ma PVC okhala ndi ma polymerization pafupifupi 2,500 [1]. Poyerekeza ndi utomoni wamba PVC, mkulu-polymerization PVC utomoni ali kulimba mkulu, yaing'ono psinjika seti, kukana wabwino kutentha, kukana kukalamba, kukana kutopa ndi kuvala kukana. Ndiwolowa m'malo mwa rabara wabwino kwambiri ndipo angagwiritsidwe ntchito pazingwe zosindikizira zamagalimoto, mawaya ndi zingwe, ma catheters azachipatala, ndi zina zambiri. [2].

Njira yopanga PVC yokhala ndi digiri yapamwamba ya polymerization imakhala makamaka kuyimitsidwa kwa polymerization [3-4]. Popanga njira yoyimitsidwa, dispersant ndi chinthu chofunikira chothandizira, ndipo mtundu wake ndi kuchuluka kwake kumakhudza mwachindunji mawonekedwe a tinthu, kugawa kwa tinthu, ndi kuyamwa kwapulasitiki kwa utomoni wa PVC. Njira zobalalitsira zomwe zimagwiritsidwa ntchito nthawi zambiri ndi makina a mowa wa polyvinyl ndi hydroxypropyl methylcellulose ndi makina omwaza mowa wa polyvinyl, ndipo opanga m'nyumba amagwiritsa ntchito zomalizazi [5].

1 Main zopangira ndi specifications

Zida zazikulu zomwe zimagwiritsidwa ntchito poyesedwa zikuwonetsedwa mu Table 1. Zitha kuwoneka kuchokera ku Table 1 kuti zoweta za hydroxypropyl methylcellulose zomwe zasankhidwa mu pepalali zimagwirizana ndi hydroxypropyl methylcellulose yomwe imatumizidwa kunja, yomwe imapereka chofunikira kuti chiyesedwe cholowa m'malo mwa pepalali.

2 Zinthu zoyesa

2. 1 Kukonzekera kwa hydroxypropyl methylcellulose solution

Tengani madzi enaake opangidwa ndi deionized, ikani mu chidebe ndikutenthetsa mpaka 70 ° C, ndipo pang'onopang'ono yonjezerani hydroxypropyl methylcellulose pansi pa kusonkhezera kosalekeza. Ma cellulose amayandama pamadzi poyamba, kenako amamwazikana mpaka atasakanikirana. Kuziziritsa njira voliyumu.

Table 1 Main zopangira ndi mafotokozedwe awo

2. 2 Njira yoyesera

Pakachipangizo kakang'ono ka 10 L, gwiritsani ntchito hydroxypropyl methyl cellulose yochokera kunja kuti muyese mayeso a benchmark kuti mudziwe njira yoyambira ya mayeso ang'onoang'ono; gwiritsani ntchito hydroxypropyl methyl cellulose m'malo mwa hydroxypropyl methyl cellulose yochokera kunja kuti ayesere; Zogulitsa za PVC zopangidwa ndi hydroxypropyl methyl cellulose zinafaniziridwa kuti ziphunzire kuthekera kwa m'malo mwa hydroxypropyl methyl cellulose. Malingana ndi zotsatira za mayeso ang'onoang'ono, kuyesa kwa kupanga kumachitika.

2. 3 Njira zoyesera

Pamaso zimene, kuyeretsa polymerization ketulo, kutseka pansi valavu, kuwonjezera ena kuchuluka kwa desalinated madzi, ndiyeno kuwonjezera dispersant; kutseka chivindikiro cha ketulo, vacuumize atadutsa nayitrogeni kuthamanga mayeso, ndiyeno kuwonjezera vinilu kolorayidi monoma; mutatha kuzizira kozizira, onjezerani woyambitsa; Gwiritsani ntchito madzi ozungulira kuti muwonjezere kutentha mu ketulo kuti mufike kutentha, ndikuwonjezera yankho la ammonium bicarbonate panthawi yake panthawiyi kuti musinthe pH ya machitidwe; pamene kuthamanga zimene akutsikira ku kuthamanga anatchula mu chilinganizo, kuwonjezera wothandizila kuthetsa ndi defoaming wothandizila, ndi kukhetsa The yomalizidwa mankhwala a PVC utomoni analandira ndi centrifugation ndi kuyanika, ndipo sampuli kusanthula.

2. 4 Njira zowunikira

Malinga ndi njira zoyeserera zamabizinesi mu standard Q31/0116000823C002-2018, nambala ya viscosity, kachulukidwe, zinthu zosakhazikika (kuphatikiza madzi) ndi kuyamwa kwa plasticizer kwa 100 g PVC utomoni wa utomoni womalizidwa wa PVC unayesedwa ndikuwunikidwa; Wapakati tinthu kukula kwa PVC utomoni anayesedwa; morphology ya PVC utomoni particles anaonedwa pogwiritsa ntchito sikani electron maikulosikopu.

3 Zotsatira ndi Zokambirana

3. 1 Kuyerekeza kusanthula kwamagulu osiyanasiyana a utomoni wa PVC mu polymerization yaing'ono

Dinani 2. Malingana ndi njira yoyesera yomwe yafotokozedwa mu 4, gulu lililonse laling'ono lomaliza la PVC resin linayesedwa, ndipo zotsatira zake zikuwonetsedwa mu Table 2.

Zotsatira za tebulo 2 zamagulu osiyanasiyana a mayeso ang'onoang'ono

Zitha kuwonedwa kuchokera ku Table 2: Kuchulukana kowonekera, nambala ya viscosity ndi kuyamwa kwa plasticizer kwa utomoni wa PVC wopezedwa ali pafupi kwambiri pogwiritsa ntchito mapadi osiyanasiyana poyesa pang'ono; utomoni mankhwala anapezedwa ntchito zoweta hydroxypropyl methylcellulose chilinganizo Ambiri tinthu kukula ndi ang'onoang'ono.

Chithunzi 1 chikuwonetsa zithunzi za SEM za zinthu za PVC resin zopezedwa pogwiritsa ntchito hydroxypropyl methylcellulose.

(1)—Kuchokera kunja hydroxypropyl methylcellulose

(2)—Domestic hydroxypropyl methylcellulose

Chith. 1 SEM ya utomoni wopangidwa mu 10-L polymerizer pamaso pa hydroxypropyl methyl cellulose

Zitha kuwoneka kuchokera pa Chithunzi 1 kuti mawonekedwe a pamwamba a PVC resin particles opangidwa ndi ma dispersants osiyanasiyana a cellulose ndi ofanana.

Pomaliza, zitha kuwoneka kuti hydroxypropyl methylcellulose yapakhomo yoyesedwa mu pepalali ili ndi kuthekera kolowa m'malo mwa hydroxypropyl methylcellulose.

3. 2 Kuyerekeza kusanthula khalidwe la PVC utomoni ndi mkulu polymerization digiri mu kupanga mayeso

Chifukwa cha kukwera mtengo komanso chiwopsezo choyesa kupanga, chiwembu chosinthira cha mayeso ang'onoang'ono sichingagwiritsidwe ntchito mwachindunji. Chifukwa chake, chiwembu chowonjezera pang'onopang'ono gawo la hydroxypropyl methylcellulose mu chilinganizo chimakhazikitsidwa. Zotsatira zoyeserera za gulu lililonse zikuwonetsedwa mu Gulu 3.

Gulu 3 Zotsatira zoyesa zamagulu osiyanasiyana opanga

Zitha kuwoneka kuchokera pa Table 3 kuti kugwiritsidwa ntchito kwa hydroxypropyl methylcellulose m'nyumba kunakulitsidwa pang'onopang'ono mpaka magulu onse a hydroxypropyl methylcellulose atalowa m'malo mwa hydroxypropyl methylcellulose. Zizindikiro zazikulu monga mayamwidwe a plasticizer ndi kachulukidwe kowoneka bwino sizinasinthe kwambiri, kuwonetsa kuti hydroxypropyl methylcellulose yapakhomo yomwe yasankhidwa mu pepalali ingalowe m'malo mwa hydroxypropyl methylcellulose yomwe idatumizidwa kunja.

4 Mapeto

Mayeso apakhomohydroxypropyl methyl cellulosepa chipangizo chaching'ono cha 10 L chikuwonetsa kuti chili ndi kuthekera kolowa m'malo mwa hydroxypropyl methyl cellulose; Zotsatira za mayeso olowa m'malo akuwonetsa kuti hydroxypropyl methyl cellulose imagwiritsidwa ntchito popanga utomoni wa PVC, zisonyezo zazikulu za utomoni wa PVC womaliza ndi cellulose ya hydroxypropyl methyl yochokera kunja alibe kusiyana kwakukulu. Pakalipano, mtengo wa cellulose wapakhomo pamsika ndi wotsika kuposa wa cellulose wotumizidwa kunja. Chifukwa chake, ngati cellulose yapakhomo imagwiritsidwa ntchito popanga, mtengo wazinthu zothandizira kupanga ukhoza kuchepetsedwa kwambiri.