Plasticizer yog ib lub pob zeb pabcuam polymer, nws ntau yam, yog xim tsis muaj ntxhiab, ntxhiab tsw, dav siv hauv kev lag luam. Feem ntau siv cov yas, roj hmab, tshuaj nplaum, khoom xuas tes, cov khoom siv kho mob, cables thiab lwm cov khoom phav phav. Epoxy plasticizer ntawm lub ntsiab ntau yam: epoxy soybean roj, Plasticizer epoxy acetyl linoleic acid methyl ester, epoxy bran oleate thiab hais txog. Nyob rau hauv cov khoom PVC, plasticity Thiab lub stability ntawm kev siv ntawm ntau ntawm nta. Epoxy plasticizer yog ib qho roj nyob hauv cov organic ua kua organic acid epoxidation thiab ua ib hoob zoo yas rau yas, tsis muaj tshuaj toxicity, highlight qhov zoo ntawm non-toxic, tshav kub thiab kev ruaj ntseg.
Lub luag haujlwm ntawm plasticizers hauv cov khoom zoo yas yog qhov tseem ceeb. Nws muaj ntau yam kev hloov yog qhov kho tau sai, kev loj hlob sai ntawm cov cuab yeej tshiab, ntau ntau thiab ntau yam tshiab, Lub tswv yim hu ua Plasticizer txhais tau ntau dua Tus qauv tsim nyog dua, thiab cov yas caws pliav hauv qhov voj voog ntawm "kev loj hlob - daim ntawv thov - toxicology test - kev txheeb xyuas kev xav - kev txhim kho ". Yog li, qhov tseeb ntawm cov yas yas yog qhov tseem ceeb rau txoj kev loj hlob ntawm kev lag luam. Thiab ua li no, plasticizer lag luam yuav tsum nyob rau hauv txoj kev hloov kho. Plasticizer sia mus thoob ntiajteb yog kev txhawb nqa lub npe hu ua cov mob tsis zoo los yog tus phooj ywg environmentally thiab biodegradable Plasticizer.
Plasticizer: yog dav siv nyob rau hauv kev lag luam, polymer additives, nyob rau hauv cov yas ua ntxiv cov khoom siv no, tuaj yeem ua rau nws yooj, txhim tau yooj yim.
Plasticizer raws li nws lub luag hauj lwm yog muab faib ua yas rau yas thiab yas lim.
Lub plhaub yas yas yog qhov thib ob monomer nkag lub sij hawm ntawm lub polymerization ntawm lub polymer, thiab txij li thaum tus thib ob monomer yog copolymerized nyob rau hauv molecular qauv ntawm lub polymer, Plasticizer cov degree ntawm polymer saw yog txo, ie, lub polymer Cov crystallinity ntawm molecular saw.
Tus txheej yas yas yog lub cev tsis sib haum xeeb los sis polymer uas yog ntxiv rau lub polymer uas yuav tsum tau muab cov yas los ua kom cov yas ntawm lub polymer. Kev sib raug zoo nrog cov polymer yog rau siab kub nce, sib sau ua kua nrog cov polymer.
Lub tswv yim ntawm kev txiav txim siab ntawm cov yas thooj ntawv yog tias cov yas plawg lub hnab yas yog cov khoov ntawm cov hlau polymer, weakening cov kev nyuab siab ntawm cov polymer molecular chains, Plasticizer uas ua rau muaj kev muaj zog ntxiv ntawm cov hlau phom polymer, Cov crystallinity ntawm cov xov tooj, cov yas ntawm lub polymer, uas yog, qhov tseem ceeb tshaj tawm tsam cov yas ntawm cov duab polymer molecular saw ntawm kev ntxhov siab thiab polymer molecular saw crystallinity, thiab lawv nyob ntawm seb cov tshuaj poly muaj tshuaj thiab lub cev tsim ntawm lub compound.
Thaum cov yas thooj ntawv ntxiv rau lub polymer, qhov kev sib cuam tshuam ntawm cov yas thiab cov kabmob polymer yog qhov tseem ceeb rau ib leeg, tshwj tsis yog tias tag nrho cov kev sib txuam (cov khoom yas thiab cov yas yas, cov yas thiab cov polymer, ntawm lub polymer thiab cov polymer) tib yam loj, nws yuav tsis muaj kev sib koom tes thiab kev tiv thaiv los tiv thaiv kabmob.
1. Van der Waals force van der Waals yog ib qho qaug zog zuj zus ntawm lub cev thiab molecules nyob rau hauv lub xeev ntawm cov khoom aggregation. Van der Waals cov rog muaj xws li lub hwj chim dispersive, Plasticizer induced quab yuam thiab orientation quab yuam. Tsuas yog cov tubtxib saum ntuj xwb.
(1) Dispersion quab yuam tshwm sim ntawm tag nrho cov ncov qaumteb qab zib los yog cov tshuaj tsis sib thooj, vim kev sib cuam tshuam ntawm cov me nyuam yaus hauv lub cev kom ua rau qhov uas nyob ib sab hauv lub xeev uas nyob ib sab.
Txawm li cas los xij, tsuas yog hauv cov tshuab tsis xws luag, xws li benzene, polyethylene los yog polystyrene, lub dispersion ntawm lub hwj huam muab tau ntau yam tseem ceeb.
(2) Induction Force Thaum ib lub lwg me me nrog cov dipole tsau ua rau lub plhom dipole rau hauv ib qho uas tsis muaj leej twg nyob rau hauv ploj, Plasticizer lub zog ntawm lub dipole thiab cov intrinsic dipole yog hu ua inducing force.
Cov kab mob uas muaj ntxhiab muaj feem xyuam yog cuam tshuam los ntawm lub siab polarization ntawm cov π electrons, xws li cov tsis tshua muaj pes tsawg molecular hnyav esters thiab polystyrene los yog benzene thiab polyvinyl acetate.
(3) orientation force Thaum lub ncov qaumteb qab rog nyob sib ze, vim yog qhov muaj lub plhom tawm ntawm lub cev los ntawm ib lub zog ntawm cov qauv uas hu ua cov kev taw qhia, xws li ester plasticizer thiab PVC los yog cov kev siv nitrocellulose.
Hydrogen bonds yog hydrogen atoms, thiab hydrogen bonds yog tsim nyob rau hauv lub molecule, tej zaum nyob rau hauv lub molecule. theem Kev cuam tshuam ntawm cov yas molecules rau hauv cov qauv molecules, Plasticizer yog tias cov kab sib txuas ntawm hydrogen raws lub polymer molecular chain tis ntawm qhov chaw ze ntawm lub plhaub yas yas nrawm dua.Yog li ntawd, yuav tsum muaj cov yas yas thiab cov poly molecular molecules tuaj yeem tsim cov qauv zoo sib xws. Rau lwm cov tes, raws li qhov kub nce, qhov kev sib tshuam hauv intermolecular yog ho tsis muaj zog los ntawm kev txo qis ntawm hydrogen bonds, vim tias cov thermal suab ntawm lub molecules hinders lub polymerization Lub orientation ntawm molecules.
3. Lub tshuab molecular ntawm lub polymer nrog cov qauv ntawm cov qauv yuav tsum tau kob tau tiav raws li cov neeg mob uas tsim nyog, uas yog, cov saw hlau molecules los ntawm qhov ntim thiab lub xeev swb mus rau hauv lub xeev nruj rau hauv lub xeev xwm txheej hauv cov kev cai, Industrially produced polymers tsis muaj peev xwm ua kom tiav crystallized, Plasticizer thiab feem ntau ua los ntawm cov cheeb tsam crystalline tawg nyob rau hauv thaj av amorphous.
Nws yog tseeb tias nws yog qhov nyuaj tshaj rau cov molecules ntawm lub plhaub taum paws mus rau hauv cheeb tsam crystalline tshaj mus rau hauv thaj tsam amorphous vim qhov chaw dawb ntawm thaj av crystalline thiab cov polymer thiab cov saw yog minimized. Yog hais tias cov molecules ntawm lub plhaub taum plob tsuas muab tso rau hauv thaj tsam amorphous ntawm cov ntoo crystallized, tus yas ci yas yog ib hom tsis muaj hnyuv quav, hu ua tus pab yas yas, yog hais tias cov molecules ntawm cov yas rau yas tau tsuas yog muab tso rau hauv cov amorphous thaj av ntawm lub polymer Thaum lub cheeb tsam siv lead ua yuav tau tso, ces cov yas lim yog ib qho hnyav raws li cov yas yas, qhov sib txawv ntawm cov yas limizer.