Xov xwm

Kev Taw Qhia: Lub Luag Haujlwm ntawm Cov Khoom Ntxiv Silicone hauv Kev Ua Polymer
Cov khoom siv silicone yog siv dav ua cov khoom pab ua thiab cov khoom hloov kho hauv kev tsim khoom polymer los tswj tus cwj pwm yaj, txhim kho cov khoom nto, thiab txhim kho kev ruaj khov ntawm kev ua haujlwm hauv qab cov xwm txheej tsim khoom siab.
Hauv cov chaw ua cov thermoplastic xws li extrusion, txhaj tshuaj molding, zaj duab xis blowing, thiab compounding, polymers feem ntau raug kev nyuaj siab shear thiab kub siab. Cov xwm txheej no tuaj yeem ua rau muaj teeb meem ua cov txheej txheem, suav nrog kev ntws tsis ruaj khov, qhov tsis zoo ntawm qhov chaw (xws li kev tawg ntawm yaj thiab daim tawv nqaij ntses), kev tsim cov pwm, thiab cov khoom tsis sib xws.
Cov khoom ntxiv silicone yog tsim los daws cov teeb meem kev sib txhuam thiab kev sib txhuam ntawm cov polymer thiab hlau, txhim kho kev sib txhuam ntawm cov khoom sib xyaw, thiab tswj kev ntws thaum lub sijhawm ua haujlwm. Yog li ntawd, lawv pab txhawb rau kev ua haujlwm ntau dua thiab kev ua haujlwm zoo dua ntawm cov khoom kawg.
Lawv siv dav thoob plaws cov kab ke polymer loj, suav nrog polyolefins (PE, PP, LLDPE, HDPE, EVA), PVC compounds, thermoplastic elastomers (TPE, TPU, TPO, TPV), thiab engineering plastics (ABS, PC, PA/Nylon, PBT, PET, PPS, POM, thiab PMMA).
Los ntawm qhov pom ntawm kev ua tiav, cov khoom siv silicone yog siv rau hauv kev rho tawm, kev txhaj tshuaj molding, kev tshuab zaj duab xis, thiab cov txheej txheem sib xyaw, qhov twg lawv pab tswj kev sib txhuam ntawm cov yaj, txo kev sib txhuam ntawm cov interfacial, thiab txo cov qhov tsis zoo ntawm qhov chaw thiab cov pwm nyob rau hauv cov xwm txheej ua haujlwm tas mus li lossis ceev ceev.
Cov ntawv thov siv kawg suav nrog cov xaim thiab cov cable systems, cov khoom siv sab hauv tsheb, cov ntaub ntawv khau, cov kav dej, cov ntim khoom yooj ywm, cov tshuaj pleev xim, cov xim pleev, cov fibers, thiab ntau yam khoom yas uas tau tsim thiab hloov kho.
Nrog rau kev lag luam nce ntxiv rau kev tsim khoom ntau dua, kev tswj xyuas zoo dua, txo cov khoom pov tseg, thiab kev txhim kho kev ruaj khov ntawm cov khoom siv, cov khoom siv silicone tsis raug saib tias yog cov khoom siv yooj yim rau kev ua haujlwm. Hloov chaw, lawv tau koom ua ke ntau dua li cov khoom siv ua haujlwm hauv kev tsim cov txheej txheem polymer, uas pab ncaj qha rau kev ua haujlwm zoo thiab kev ua haujlwm ntawm cov khoom kawg.
Yog li ntawd, cov chaw tsim khoom siv silicone additive tau dhau los ua cov neeg koom tes tseem ceeb hauv kev siv tshuab thoob plaws ntiaj teb polymer value chain.
Tsab xov xwm no qhia txog 10 lub tuam txhab tsim khoom siv silicone zoo tshaj plaws thoob ntiaj teb, pab cov neeg ua haujlwm txheeb xyuas cov neeg muab khoom, cov thev naus laus zis, thiab cov kev daws teeb meem rau cov ntawv thov ua polymer.

Cov Khoom Siv Ntxiv Silicone Yog Dab Tsi?
Cov khoom ntxiv silicone - tseem hu ua cov khoom ntxiv silicone, cov khoom ntxiv siloxane, lossis cov khoom ntxiv polysiloxane - yog cov khoom pab ua haujlwm thiab cov ntaub ntawv txhim kho kev ua tau zoo feem ntau yog raws li polydimethylsiloxane (PDMS) lossis cov khoom sib xyaw organosilicon hloov kho.
Lawv raug muab tso rau ntawm qhov concentration tsawg tsawg (feem ntau yog 0.1–5%) los txhim kho kev ua haujlwm, cov yam ntxwv ntawm qhov chaw, thiab kev ruaj khov mus sij hawm ntev.
Cov Haujlwm Tseem Ceeb
• Txo qhov sib txhuam ntawm cov yaj thiab txhim kho tus cwj pwm ntws
• Tiv thaiv kom tsis txhob muaj qhov tsis zoo ntawm qhov chaw xws li tawg thiab tawv nqaij ntses
• Txo cov pwm sib sau ua ke thiab txo cov khoom siv uas tsis huv
• Txhim kho qhov du thiab cov khoom kov tau zoo dua
• Txhim kho kev ruaj khov ntawm kev tsim khoom thiab kev ua haujlwm ntau ntxiv

Cov Chemistry Tseem Ceeb ntawm Silicone Additives
Qhov kev ua tau zoo ntawm cov khoom siv silicone pib los ntawm lawv cov pob txha caj qaum silicon-oxygen (Si-O), feem ntau ua haujlwm nrog cov pab pawg organic xws li methyl.
Cov qauv molecular tshwj xeeb no muab:
• Kev nruj ntawm qhov chaw qis rau kev ua kom lubrication zoo dua
• Kev ruaj khov siab ntawm thermal thiab oxidative nyob rau hauv cov xwm txheej ua haujlwm nyuaj
• Hydrophobicity uas pab tiv thaiv cov polymer nto los ntawm cov dej noo
• Kev nplua thiab lubricity zoo heev, txo qhov kev ntxhov siab thaum lub sijhawm extrusion thiab molding
• Kev tsis muaj tshuaj lom neeg thiab kev ywj pheej, ua rau muaj kev sib raug zoo nrog ntau hom polymers

Cov Hom Tshuaj Silicone Niaj Hnub
Cov khoom ntxiv silicone yog tsim los ua kom tau raws li qhov yuav tsum tau ua haujlwm tshwj xeeb nyob ntawm qhov hnyav molecular, cov pab pawg ua haujlwm, thiab cov qauv polymer. Cov qauv kev lag luam feem ntau suav nrog cov kua silicone (roj), siloxanes, polyether-modified silicones, silicone resins, silicone masterbatches, thiab silicone hmoov.

1. Silicone Masterbatch
Silicone masterbatch yog ib hom pelletized zoo tshaj plaws uas siv dav hauv kev lag luam polymer. Cov thev naus laus zis niaj hnub no siv cov khoom siv ultra-high molecular weight (UHMW) siloxane polymers mus rau hauv ntau yam thermoplastic carriers (xws li polyolefins, engineering plastics, thiab thermoplastic elastomers). Xa tuaj rau hauv daim ntawv pellet txheem, nws tso cai rau kev ntxuav, meej dosing ncaj qha rau hauv thermoplastic matrix thaum lub sijhawm compounding, extrusion, lossis txhaj tshuaj molding. Tsis zoo li cov roj quav ciab ib txwm muaj, fatty acid amides, lossis cov roj molecular qis, UHMW silicone masterbatches muab kev nplua zoo dua ntawm qhov chaw thiab pwm tso tawm thaum tiv thaiv cov teeb meem ua tiav xws li kev nplua ntsia hlau.

2. Cov kua silicone (PDMS)
Cov Kua Silicone (PDMS) yog cov kua silicones uas tsis hnyav heev, tsis muaj zog, thiab tsis muaj zog uas muaj cov silicon-oxygen (-Si-O-) rov ua dua nrog cov pab pawg methyl. Hauv kev ua cov polymer, lawv ua haujlwm feem ntau ua cov khoom siv pab ua cov khoom siv ib ntus thiab cov roj nplua nyeem sab nraud. Vim lawv cov molecular mobility siab thiab tsis muaj kev sib txuas tshuaj nrog cov polymer matrix, lawv txo qis cov viscosity yaj thiab torque tab sis yooj yim rau kev tsiv teb tsaws chaw, ua rau cov nplaim tawm, cov ntsia hlau slippage, thiab tom qab ntawd cov xim lossis luam ntawv tsis ua haujlwm.

3. Cov Khoom Siv Organosilicone Ua Haujlwm
Cov Khoom Siv Ntxiv Organosilicone uas Muaj Peev Xwm Ua Haujlwm yog cov tshuaj lom neeg, lossis cov khoom siv hloov kho silicone uas suav nrog cov pab pawg ua haujlwm reactive lossis polar (xws li epoxy, amino, carboxy, vinyl, lossis polyether segments) rau hauv siloxane backbone lossis saw hlau kawg. Tsis zoo li cov PDMS ib txwm muaj, cov khoom ntxiv no tau tsim los ua cov khoom hloov kho interfacial thiab cov khoom sib xws reactive. Lawv txo qhov kev sib txhuam interfacial thiab txhim kho qhov sib txuas ntawm cov khoom tsis sib xws, ua rau lawv tseem ceeb rau kev txhim kho cov yas engineering, txhawb kev ua haujlwm ntawm cov polymers rov ua dua tshiab / PCR, thiab txhim kho kev ntub dej thiab kev sib kis (piv txwv li, halogen-free flame retardants, iav fibers) hauv ntau cov khoom polymer systems.

4. Cov Hmoov Silicone
Cov Hmoov Silicone yog cov khoom siv silicone uas ntws tau yooj yim, khov kho, thiab feem ntau muaj cov polymers siloxane uas muaj qhov hnyav molecular siab heev (UHMW) uas tau teeb tsa rau hauv lub hauv paus inorganic silica, lossis cov resins silicone spherical peb-seem (piv txwv li, polymethylsilsesquioxane). Lawv tau tsim los ua cov khoom hloov kho kev ua haujlwm tas mus li, thiab tau muab sib xyaw ua cov thermoplastics los muab kev txhim kho ntawm qhov chaw ntev - xws li kev tiv thaiv khawb thiab hnav tas mus li, kev txo qis ruaj khov hauv Coefficient of Friction (COF), thiab cov yam ntxwv tiv thaiv kev thaiv - yam tsis muaj kev cuam tshuam rau cov khoom siv kho tshuab ntawm cov khoom siv lossis kev pleev xim tom qab ua tiav.