petg

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Kuphatikiza pakuyera (wosawerengeka) PET, PET yosinthidwa ndi kopolymerization iliponso.

Nthawi zina, zinthu zosintha za Copolymer ndizofunikira pantchito inayake. Mwachitsanzo, cyclohexane dimethanol (CHDM) ikhoza kuwonjezeredwa ku mafupa a msana wa polymer m'malo mwa ethylene glycol. Popeza nyumbayi ndi yayikulu kwambiri (maatomu 6 owonjezera a kaboni) kuposa gawo la ethylene glycol lomwe amalowa m'malo mwake, siligwirizana ndi maunyolo oyandikana nawo momwe gulu la ethylene glycol limakhalira. Izi zimasokoneza crystallization ndikuchepetsa kutentha kwa polima. Mwambiri, PET yotere imadziwika kuti PETG kapena PET-G (Polyethylene terephthalate glycol-modified; Eastman Chemical, SK Chemicals, ndi Artenius Italia ndi ena opanga ma PETG). PETG ndichodziwika bwino cha amorphous thermoplastic yomwe imatha kupangidwira jekeseni kapena pepala kutulutsa. Ikhoza kukhala yonyezimira pokonza.

Njira ina yodziwika ndi asidi isophthalic, m'malo mwa ena 1,4- (pa-) cholumikizidwa adabali mayunitsi. The 1,2- (chita) kapena 1,3- (cholinga-) kulumikizana kumatulutsa ngodya mumtengowo, zomwe zimasokonezeranso kukokana.

Ma pololymer oterewa ndiwothandiza pamapulogalamu ena owumba, monga Thermoforming, yomwe imagwiritsidwa ntchito mwachitsanzo kupanga matayala kapena chithuza kuchokera ku filimu ya Co-PET, kapena pepala la amorphous PET (A-PET) kapena PETG. Kumbali inayi, crystallization ndiyofunikira pakugwiritsa ntchito kwina komwe kukhazikika kwamakina ndi mawonekedwe ndizofunikira, monga malamba okhala. Mabotolo a PET, kugwiritsa ntchito ochepa mankhwala a isophthalic acid, CHDM, Diethylene glycol (DEG) kapena ma comonomers ena atha kukhala othandiza: ngati ndalama zochepa chabe zomwe zimagwiritsidwa ntchito, crystallization imachedwa koma osapewedwa kwathunthu. Zotsatira zake, mabotolo amapezeka kudzera Tambasula nkhuni ("SBM"), zomwe zonse ndizowoneka bwino komanso crystalline wokwanira kukhala chotchinga chokwanira kununkhira komanso ngakhale mpweya, monga kaboni dayokisaidi muzakumwa za kaboni.