To taub qhov Toughness, Rigidity thiab Impact Resistance ntawm Plastics

"Kev Ruaj Khoov" txhais tau hais tias lub zog uas xav tau rau ib qho khoom uas yuav tsum tau hloov pauv ib zaug; "Kev Yoog Tau" txhais tau hais tias lub zog ntawm ib yam khoom uas yuav tsum tau hloov pauv ib zaug nyob rau hauv ib qho zog. Qhov "kev nruj" loj dua, qhov kev hloov pauv yuav tsawg dua; qhov "kev ywj pheej" loj dua, qhov kev hloov pauv yuav yooj yim dua. Cov khoom uas muaj kev tawv zoo yog mos, thiab qhov kev ncab ntawm lub zog tensile thaum tawg thiab lub zog cuam tshuam loj dua, thaum qhov nyuaj, lub zog tensile thiab tensile elastic modulus me dua.

Raws li pom tau los ntawm cov lus piav qhia saum toj no, qhov tawv thiab qhov tawv yog qhov sib txawv, tab sis rau cov yas hloov kho lawv yog sib txuas. Piv txwv li, thaum cov yas fiberglass reinforced plastics ua kom tawv dua, ob qho tib si lub zog tensile thiab lub zog cuam tshuam yuav nce ntxiv.

Yuav ua li cas los txhim kho cov yas tawv?

Nws pom tau tias kev ua kom lub zog ntawm cov matrix resin tuaj yeem txhim kho qhov cuam tshuam ntawm cov yas tawv.

Muaj ntau txoj hauv kev ua kom tawv, xws li nce qhov hnyav molecular ntawm cov matrix resin kom nqaim qhov faib tawm ntawm qhov hnyav molecular, lossis tswj cov crystallization, crystallinity, qhov loj me ntawm crystal thiab cov duab crystal kom txhim kho qhov tawv siab.

Yuav ua li cas kom paub qhov txawv ntawm cov yas uas feem ntau siv cov neeg sawv cev toughening?

• Cov roj hmab elastomer tawv
EPR (binary ethylene-propylene), EPDM (EPDM), butadiene roj hmab (BR), roj hmab ntuj (NR), isobutene roj hmab (IBR), nitrile roj hmab (NBR), thiab lwm yam. Haum rau txhua yam kev hloov kho yas resin toughening;

• Cov thermoplastic elastomers raug ua kom tawv dua
SBS, SEBS, POE, TPO, TPV, thiab lwm yam. Rau polyolefin lossis cov resin tsis-polar toughening, rau polyester, polyamide thiab lwm yam polymers uas muaj cov pab pawg polar functional toughening xav tau ntxiv cov compatibilizers;

• Cov copolymer uas ua los ntawm cov tub ntxhais thiab cov plhaub uas tawv thiab muaj zog
ACR (acrylate), MBS (methyl acrylate-butadiene-styrene copolymer), PTW (ethylene-butyl acrylate-glycidyl methacrylate copolymer), E-MA-GMA (ethylene-methyl acrylate-glycidyl methacrylate copolymer), thiab lwm yam. Siv rau kev ua cov yas engineering thiab cov khoom siv polymer alloy uas tiv taus kub siab;

• Ua kom tawv los ntawm kev sib xyaw cov yas uas muaj zog heev
PP/PA, PP/ABS, PA/ABS, HIPS/PPO, PPS/PA, PC/ABS, PC/PBT, thiab lwm yam. Kev siv tshuab polymer alloy yog ib txoj hauv kev tseem ceeb los npajcov yas engineering uas muaj zog heev.

• Lwm txoj kev los ua kom tawv
Kev ua kom cov nano-particles tawv (xws li nano-cacO3), kev ua kom cov sarin resin (Dupont metal ionomer) tawv, thiab lwm yam.