Kev hloov kho tshuaj
Kev hloov tshuaj lom neeg ntawm ethylene-propylene roj hmab Thaum peroxide lossis sulfide ntxiv rau ethylene-propylene roj hmab, thaum peroxide siv los ua tus neeg saib xyuas, lub elastomer thiab plasticizing theem yuav raug cuam tshuam rau qhov sib txawv. Peroxide tawm tsam cov elastomer thiab polymer. , tsim cov pab pawg nquag, ua rau muaj kev sib txuas zoo dua, ua rau muaj kev cuam tshuam ntawm cov ntu molecular, thiab qhov loj dua qhov entanglement, qhov loj dua qhov shrinkage. Txawm li cas los xij, tus nqi ntawm peroxide yuav tsum tau tswj nruj me ntsis. Cov nyiaj ntau dhau yuav ua rau kev sib txuas sib txuas nyuaj thiab qhov cuam tshuam tag nrho lub zog yuav txo qis.
Grafting cov tshuaj tiv thaiv ntawm EPDM Txij li thaum EPDM tsis muaj pawg polar, nws muaj kev sib raug zoo nrog cov polar polymers. Dibutyl maleate nrog kub kub taw tes thiab tsis tshua muaj toxicity yog siv rau fusion bonding. ceg tau muab faib rau hauv nws cov saw hlau hydrocarbon nrog cov pawg polar kom tau txais cov khoom siv ua haujlwm tau zoo, uas tau txhim kho nws cov kev sib raug zoo nrog cov polymers uas muaj cov pawg polar, xws li hauv yaj sib xyaw nrog nylon rau yaj grafting. Hauv EPDM, pawg carboxyl lossis anhydride pawg tso rau hauv cov saw hlau nquag ntawm EPDM reacts nrog cov pab pawg kawg ntawm nylon los txhim kho lub zog sib txuas.
Grafting tshuaj tiv thaiv
Grafted Maleic Anhydride Maleic anhydride grafted hydrogenated copolymers tau siv los ua compatibilizers rau lub melt-mixed theem. Maleic anhydride tau nkag mus rau hauv polyolefin lub cev tseem ceeb los ntawm yaj grafting ua interfacial compatibilizer. Qhov siab dua qhov grafting tus nqi ntawm maleic anhydride, qhov siab dua cov khoom ntawm cov khoom sib xyaw.
Diethylhexyl fumarate yog siv rau grafting fumarate. Nyob rau hauv lub xeev molten, cov dawb radical cov tshuaj tiv thaiv pib los ntawm peroxide tuaj yeem graft lub monomer ntawm fumarate ntawm cov polymer los txhim kho qhov sib xyaw. Nruab nrab sphere loj. Cov grafted hydroxyethyl methacrylate siv peroxide ua tus pib, thiab cov polymer yog grafted nrog hydroxyethyl methacrylate nyob rau hauv lub xeev molten, tab sis tus nqi ntawm peroxide yuav tsum tau tswj.
Grafted glycidyl methacrylate Cov epoxy pawg nyob rau hauv glycidyl methacrylate (GMA) muaj siab reactivity, thiab cov khoom tau los ntawm grafting lub polymer yuav siv tau raws li ib tug zoo heev compatibilizer rau polymer alloy systems. Cov polymer, glycidyl methacrylate thiab dicumyl peroxide yog sib xyaw ua ke ua ntej, thiab tom qab ntawd granulated thiab grafted los ntawm yaj extrusion. Qhov grafting tus nqi tsis nce nrog qhov nce ntawm peroxide, tab sis txo qis nrog qhov nce ntawm peroxide. Hauv cov tshuaj tiv thaiv grafting, ntxiv styrene-raws li macromolecular dawb radicals muaj ntau dua reactivity nrog cov polymer tshaj GMA. Styrene tau nyiam grafted mus rau lub polymer los tsim kom ruaj khov styrene-raws li macromolecular radicals, thiab ces GMA koom nrog cov tshuaj tiv thaiv. Cov tshuaj tiv thaiv tus nqi ntawm GMA nrog styrene-raws li macromolecular dawb radicals yog ntau dua li ntawm GMA thiab polymers, yog li qhov grafting tus nqi ntawm GMA tuaj yeem nce ntxiv, ntau cov dawb radicals ntawm polymers tau noj, thiab degradation ntawm polymers tuaj yeem ua tau. inhibited. Ntxiv me me ntawm unsaturated ob daim ntawv cog lus thermoplastic elastomer (SEBS) nyob rau hauv lub molecule los yog linoleic acid triglyceride nrog ntau dua ob daim ntawv cog lus nyob rau hauv lub molecule kuj yuav txo tau qhov degradation.
Txoj kev uas tsis yog-melting grafting reacts lub polymer nrog chlorobenzene, tert-butyl peroxide chlorinated tov, maleic anhydride thiab acetone, thiab cov reactant yog ntxuav nrog ib tug loj npaum li cas ntawm acetone, lim thiab qhuav kom tau cov graft ntawm maleic anhydride.
Micro-oxidized polymer hmoov rau grafting acrylic acid yog reacted nrog acrylic acid los npaj polyacrylic acid grafted polymer. Thaum cov khoom siv polymer thiab kaolin sib xyaw no tau siv los ua cov khoom sib xyaw ua ke, cov khoom siv sib xyaw ua ke tau zoo dua qub, thiab toluene yog siv los ua cov khoom sib xyaw. Thaum siv cov kuab tshuaj, qhov graft piv ntawm cov polymer grafted los ntawm methacrylic acid tuaj yeem ncav cuag 20 feem pua. Radiation grafting siv CO60 hluav taws xob grafting qhov chaw rau graft acrylonitrile mus rau polymer, thiab grafting tus nqi tuaj yeem ncav cuag ntau dua 40 feem pua los ntawm kev siv cov kuab tshuaj haum.