PPR yog cov ntawv luv ntawm PolypropyleneRandom, thiab nws lub npe tshuaj yog random copolymerized polypropylene, uas feem ntau hu ua hom 3 polypropylene. propylene monomer thiab ib qho me me ntawm ethylene monomer (3 feem pua -5 feem pua) ) yog randomly copolymerized nyob rau hauv qhov kev txiav txim ntawm cua sov, siab thiab catalyst.
Raws li lub siab polymer, polypropylene lub toughness yog heev cuam tshuam los ntawm kub thiab loading ceev. Thaum qhov kub siab tshaj qhov kub hloov pauv iav, qhov cuam tshuam tawg yog tawg tawg, thiab thaum qhov kub thiab txias qis dua qhov kub hloov pauv iav, nws yog nkig tawg. Thaum qhov kub thiab txias qis dua lub iav hloov pauv kub, qhov cuam tshuam quab yuam yuav tsum tau rau kev tawg ntawm cov ntaub ntawv polymer yuav raug txo kom tsawg. Nws yog ib qho tsim nyog hais tias lub iav hloov pauv kub ntawm cov khoom sib txawv yog qhov sib txawv, thiab qhov kub ntawm cov khoom siv PPR yog qhov siab, yog li nws qhov kub thiab txias kuj tsis zoo, uas kuj yog vim li cas cov kav dej PPR tsis cuam tshuam rau qhov kub thiab txias. .
Cov muaj pes tsawg leeg ntawm ppr feem ntau yog tsim los ntawm propylene monomer, thiab kev qhia me me ntawm ethylene monomer (polyethylene polypropylene iav hloov kub yog qis dua li ntawm polypropylene polypropylene polypropylene polypropylene) tau txhim kho qhov cuam tshuam, tab sis kev qhia txog ethylene yuav cuam tshuam. ppr High-temperature kev ua tau zoo, rau cov kav dej hauv tsev, yuav tsum muaj kev ua haujlwm siab, yog li qhov no yog qhov tsis sib xws, thiab cov thev naus laus zis nws tus kheej yog qhov teeb meem nyuaj los daws.
Txias thiab nkig yog qhov ua tau zoo ntawm cov khoom siv PPR, uas yog qhov tsis tuaj yeem zam tau, uas yog vim li cas lub tsho tiv thaiv tshav kub yuav tsum tau nruab thaum PPR cov kav dej raug teeb tsa sab nraum zoov. Tom qab txhua tus nkag siab txog nws txoj cai, lawv yuav tsum tau ua tib zoo saib xyuas kom tsis txhob muaj kev puas tsuaj rau cov kav dej PPR vim yog brittleness thiab kev tsim kev kub ntxhov.
