Dab tsi yas ultrasonic vuam nyhuv zoo dua?

Amorphous polymer (ABS, PC, PS, PVC, PMMA, thiab lwm yam). Xws li cov resins feem ntau ua tau zoo ntawm kev xa cov kev vibrations supersonic thiab ua tiav cov vuam zoo tshaj qhov sib txawv ntawm qhov siab / amplitudes. Crystalline polymers (PE, PP, POM, PA6, PA66, PBT, PET, thiab lwm yam): cov molecules yog cov txheej txheem thiab muaj qhov pom tseeb melting point (Tm melting kub) thiab refreezing point. Cov khoom siv crystalline polymers yog elastic thiab tuaj yeem nqus tau qee qhov kev siv tshuab ua haujlwm siab. Yog li ntawd, xws li polymers tsis yooj yim rau kis ultrasonic kev co zog mus rau qhov chaw sib txuas, uas yuav tsum tau ntau dua amplitude. Lub zog siab (lub siab melting kub) yuav tsum tau ua kom tawg cov txheej txheem semi-crystalline thiab ua kom cov khoom hloov pauv los ntawm lub xeev crystalline mus rau lub xeev khov, uas kuj txiav txim siab qhov pom tseeb melting point ntawm cov khoom no. Thaum cov khoom molten tawm ntawm qhov chaw tshav kub, qhov kub thiab txias txo mus rau ib qho twg, ua rau cov khoom tawg sai sai. Qhov thib ob, feem ntau hais lus, tsis yog-polar tebchaw (xws li PP thiab PE) yog qhov nyuaj rau ultrasonic (tsis ua tsis tau), polar compounds tuaj yeem ua ultrasonic, thiab nruab nrab ntawm cov polar tebchaw kuj tuaj yeem ua ultrasonic, xws li ABS thiab PMMA yog ultrasonic. Tsis tas li ntawd, muaj qee cov yam ntxwv uas yuav cuam tshuam rau cov nyhuv ntawm ultrasonic, xws li hardness (feem ntau, qhov siab dua qhov hardness, qhov zoo dua cov ultrasonic vuam), melting point (siab dua qhov melting point, lub zog ultrasonic xav tau), purity. (cov nyhuv vuam ntawm cov ntaub ntawv raw yog qhov zoo, cov nyhuv ntawm cov khoom siv rov ua dua nrog impurities yog me ntsis zuj zus).