Cov polymers uas lwj tau zoo li cas PBAT thiaj li sib xyaw tau nrog?

Polybutylene terephthalate (PBAT) yog ib hom tshiab ntawm cov aliphatic-aromatic copolyester uas muaj biodegradable tag nrho nrog cov saw hlau uas sib xyaw ua ke qhov yooj ywm ntawm cov hydrocarbons aliphatic ntev nrog lub zog ntawm cov nplhaib aromatic, muab nws qhov yooj ywm zoo heev. Yog li ntawd, PBAT tau dhau los ua ib qho ntawm cov khoom siv degradable tshaj plaws hauv kev tshawb fawb txog cov yas biodegradable thiab cov ntawv thov kev lag luam zoo. Txawm li cas los xij, qhov muaj cov saw hlau PBT aromatic hauv cov saw hlau molecular ua rau muaj qhov qeeb qeeb degradation. Nws kuj muaj qhov crystallinity qis thiab viscosity siab, uas ua rau nws yooj yim rau adhesion. Tsis tas li ntawd, cov khoom siv kim heev, ntxiv txwv nws txoj kev loj hlob thiab daim ntawv thov kev lag luam. Yog li ntawd, txhawm rau kom txo tus nqi thiab tau txais cov yas degradable ua tau zoo, kev hloov kho ntawm PBAT yuav tsum tau kawm. Kev sib xyaw PBAT nrog cov polymers biodegradable yog ib txoj hauv kev hloov kho uas tau ua pov thawj, uas tuaj yeem txhim kho lwm yam khoom yam tsis cuam tshuam rau qhov degradability ntawm PBAT, thiab qee cov polymers biodegradable kuj tuaj yeem txhim kho qhov degradation ntawm PBAT.

-PBAT sib xyaw nrog PLA-

Polylactic acid (PLA), yog ib qho ntawm cov khoom siv biodegradable uas tau tshawb fawb thiab ua lag luam tau zoo tshaj plaws, muaj cov yam ntxwv zoo heev thiab cov khoom thaiv, tab sis kuj muaj qhov tsis zoo ntawm kev tawv thiab tsis tawv, tsis muaj kev ywj pheej thiab elasticity. Yog li ntawd, kev sib xyaw ntawm PBAT uas muaj zog nrog PLA tsis yog tsuas yog txhim kho qhov tawv ntawm PLA, tab sis kuj ua kom nrawm dua qhov kev lwj ntawm PBAT.

Nws tau pom tias qhov ntxiv ntawm PLA ua rau lub zog tensile ntawm qhov sib xyaw ua ke zoo dua yam tsis cuam tshuam rau cov khoom siv crystalline ntawm PBAT; thiab tias qhov nce viscosity yaj ua rau kev ruaj khov ntawm PBAT zaj duab xis thaum lub sijhawm ua thiab tsim.

Vim tias PBAT thiab PLA yog cov kab ke tsis sib xws, tam sim no muaj kev tshawb fawb ntxiv los txhim kho qhov sib xws ntawm ob qho no, ua rau muaj cov khoom sib xyaw zoo dua. Piv txwv li, kev koom ua ke ntawm glycidyl methacrylate (GMA) ntawm qhov loj ntawm 3% txog 5% tuaj yeem ua rau lub zog cuam tshuam ntawm PLA/PBAT sib xyaw mus txog 26.5% thiab 51.7%, thaum txhim kho qhov kev sib kis ntawm PBAT hauv PLA. Tsis tas li ntawd, kev ntxiv cov saw hlau txuas ntxiv tuaj yeem txo qhov kev sib txhuam ntawm ob qho, uas ua rau cov yeeb yaj kiab PBAT/PLA zoo dua; kev ntxiv cov yas ua ke ntau yam thiab lub capacitor tuaj yeem tsim cov peev xwm zoo thiab cov yas rau PBAT/PLA sib xyaw, thaum txhim kho cov khoom ua tiav.

-PBAT sib xyaw nrog PPC-

Polypropylene carbonate (PPC) yog ib qho khoom siv uasib puag ncig tus phooj ywg yasua los ntawm kev sib hloov copolymerization ntawm cov khib nyiab lag luam carbon dioxide thiab propylene oxide, uas muaj kev puas tsuaj thiab zoo heev tiv taus permeability. Txawm li cas los xij, nws yog cov khoom siv amorphous, qhov kub hloov pauv iav tsuas yog 30-40 ° C, thiab muaj qhov kub qis toughness, qhov kub siab ruaj khov tsis zoo, zaj duab xis nyuaj thiab lwm yam tsis zoo. Kev sib xyaw ntawm PPC nrog PBAT tsis yog tsuas yog txhim kho cov txheej txheem muaj peev xwm ntawm PPC, tab sis kuj muab PBAT nrog kev ua tau zoo dua, thiab cov khoom sib xyaw ua ke yuav muaj qhov chaw loj hlob zoo hauv kev ntim khoom noj pov tseg, cov ntaub ntawv kho mob, thiab lwm yam.

Vim tias qhov feem ntawm PPC tsis muaj zog nyob rau hauv lub kaw lus sib xyaw, qhov loj me ntawm cov zaj duab xis PBAT/PPC raug txo qis; kev koom ua ke ntawm PPC txhim kho lub zog tensile thiab cov khoom siv roj ntawm cov zaj duab xis sib xyaw thaum ua kom ntseeg tau tias muaj biodegradability ntawm lub matrix. Tsis tas li ntawd, qhov muaj PPC thiab PBAT zoo txhim kho qhov thermal stability, crystallinity thiab cov khoom siv kho tshuab ntawm cov sib xyaw; thaum tsuas yog 10% PPC los ntawm pawg muaj, qhov kub ntawm crystallization ntawm cov sib xyaw nce ntxiv ntawm 37.5 ° C mus rau 66.8 ° C, uas ua rau cov txheej txheem tsim zaj duab xis tshuab yooj yim dua.

Vim tias PBAT yog ib qho crystalline polymer thiab muaj cov saw hlau loj polar molecular, nws kuj muaj teeb meem sib xws nrog PPC. Kev qhia txog cov saw hlau extender triphenylmethane triisocyanate ua rau muaj kev nce ntxiv ntawm lub zog tensile thiab kua muag ntawm zaj duab xis PBAT/PPC hauv ob qho kev taw qhia longitudinal thiab transverse; kev qhia txog tus neeg sawv cev qhib monoglyceride stearate kuj tau txhim kho qhov ruaj khov ntawm zaj duab xis thaum lub sijhawm tshuab. Tsis tas li ntawd, kev ntxiv ntawm tus neeg sawv cev bulking ethylene methyl acrylate - glycidyl methacrylate (EMA-GMA) rau hauv kev sib xyaw ntawm PPC thiab PBAT tsis yog tsuas yog txhim kho qhov ruaj khov ntawm kev ua thiab qhov zoo ntawm zaj duab xis tshuab, tab sis kuj txhim kho nws cov khoom siv kho tshuab, oxygen barrier thiab UV shielding zog.

-PBAT sib xyaw nrog PBS-

Polybutylene succinate (PBS) muaj kev ua tau zoo tshaj plaws ntawm cov yas biodegradable uas twb muaj lawm, nrog rau cov khoom siv kho tshuab zoo heev; txawm li cas los xij, nws cov viscosity qis ua rau lub zog yaj tsis zoo, uas tsis zoo rau kev ua los ntawm kev tshuab moulding lossis cam khwb cia, thiab cov khoom muaj qee qhov brittleness. Yog li ntawd, los ntawm kev siv PBAT thiab PBS hloov kho sib xyaw, qhov zoo ntawm ob qho tib si tuaj yeem ua ke los ua kom muaj qhov tsis zoo, thiab cov khoom ua tau tuaj yeem siv rau hauv kev ntim khoom, cov khoom siv rooj tog, cov yeeb yaj kiab ua liaj ua teb, cov ntaub ntawv biomedical thiab lwm yam teb.

Feem ntau, cov ntsiab lus ntawm PBS hauv PBAT/PBS sib xyaw yuav tsum tsis txhob siab dhau, txog li 25% yog qhov tsim nyog. Nws tau pom tias PBAT/PBS sib xyaw ua ke qhia txog cov qauv tensile siab thiab elongation siab thaum tawg thaum qhov feem pua ​​ntawm PBS yog 25%; thaum cov ntsiab lus PBS siab dhau, cov khoom lag luam qhia txog kev tawg yooj yim.

-PBAT sib xyaw nrog PHBV-

Poly(pentyl hydroxybutyrate) (PHBV) yog ib yam khoom siv biomaterial ua los ntawm cov khoom siv rov ua dua tshiab, uas tau tsim los ntawm kev fermentation nrog cov pa roj carbon thiab lub zog khaws cia rau hauv cov kab mob me me, uas muaj kev puas tsuaj zoo thiab biocompatibility; txawm li cas los xij, nws kuj muaj qhov tsis zoo xws li kev ruaj khov thermal tsis zoo thiab cov khoom siv crystallization tsis zoo. Yog li ntawd, kev sib xyaw nrog PBAT tuaj yeem txhim kho cov khoom siv crystalline ntawm PHBV thiab txhim kho cov khoom siv ua thiab daim ntawv thov ntawm cov khoom siv.

Qhov kev sib xyaw ntawm PHBV thiab PBAT ua rau pom tias muaj peev xwm ua tau zoo dua thiab cov khoom siv zaj duab xis zoo dua; thiab cov khoom siv kho tshuab ntawm zaj duab xis zoo ib yam li cov zaj duab xis ntim khoom noj khoom haus, nrog rau cov kab mob txog li 750% thaum tawg.

-PBAT sib xyaw nrog PGA-

Polyglycolic acid (PGA) muaj cov qauv molecular thiab kev ua tau zoo zoo ib yam li PLA, tab sis nws muaj cov khoom puas tsuaj zoo dua thiab cov khoom thaiv; tsis yog tsuas yog tus nqi khoom siv raw qis xwb, tab sis nws kuj muaj qhov zoo ntawm lub zog tensile siab thiab qhov kub thiab txias siab. Yog li ntawd, kev xaiv PGA rau PBAT blending kev hloov pauv muaj peev xwm zoo rau kev siv hauv kev lag luam ntawm cov khoom pov tseg xws li cov khoom siv tais diav tiv taus cua sov, cov hnab yas biodegradable thiab cov khoom ntim thaiv.

Tau pom tias PBAT/PGA composites nrog PGA pawg feem ntawm 20% muaj lub zog tensile ntawm 25 MPa thiab elongation ntawm tawg ntau dua 600%, uas tuaj yeem siv los ua cov khoom zaj duab xis; PBAT/PGA composites nrog PGA pawg feem ntawm 80% muaj qhov kub thiab txias ntawm 120 ° C thaum txhim kho kev tawv, uas tuaj yeem siv los ua cov tais diav pov tseg; lub caij no, ntxiv PGA. Kev ntxiv PGA tuaj yeem txhim kho qhov ua tau zoo ntawm cov pa dej ntawm PBAT/PGA composite zaj duab xis.

Ib yam li PLA, qhov sib xws ntawm PGA thiab PBAT tsis zoo, yog li yuav tsum xaiv cov khoom sib xws uas tsim nyog los txhim kho qhov kev sib kis ntawm lub cev. Piv txwv li, 4,4′-ylidenebis(isocyanatophenyl) (MDI) siv tau los ua kom cov khoom sib xyaw PBAT/PGA muaj zog. Qhov kev sib xyaw ua ke nrog MDI ua rau muaj kev sib txuas ntawm cov khoom sib xyaw thiab ua rau muaj zog cuam tshuam ntau ntxiv los ntawm 9.0 kJ/m2 mus rau 22.2 kJ/m2; thiab txo qhov crystallinity thiab qhov loj ntawm cov siv lead ua spherical, uas ua rau muaj kev tawv ntawm cov khoom sib xyaw thiab lawv qhov kev ruaj khov thermal.

-PBAT sib xyaw nrog PVB-

Polyvinyl butyral (PVB) yog cov khoom ntawm cov kua qaub-catalyzed condensation ntawm polyvinyl cawv thiab n-butyraldehyde, nrog rau qee qhov plasticizer hauv nws cov khoom siv rov ua dua tshiab. Vim nws cov qauv molecular, PVB muaj kev sib xyaw ua ke ntawm lub zog tensile siab, kev tiv thaiv kev cuam tshuam, kev pom tseeb siab, kev ywj pheej thiab kev puas tsuaj. Raws li cov khoom siv rov ua dua tshiab ntug PVB muaj nyob rau hauv ntau ntau thiab ntawm tus nqi qis, yog li nws xaiv ua cov khoom hloov kho muaj qhov zoo heev rau kev txhim kho. Qhov concentration qis ntawm PVB ua rau qhov kub ntawm crystallization ntawm PBAT nce; qhov sib xws thiab cov khoom siv kho tshuab ntawm PBAT / PVB tau txhim kho los ntawm kev ua haujlwm sib koom ua ke ntawm capacitor ionomer thiab PVB.