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Cited by 29 publications
(44 citation statements)
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“…The energetic ultrasound waves are exploited to cyclically heat and deform the polymer at ultrasound frequencies. The melting of the polymer is then controlled by the friction heating at the contact points between the pellets and by the viscoelastic heating generated by the damping of the ultrasonic oscillation within the polymer itself [20,21].…”
Section: Introductionmentioning
confidence: 99%
“…The energetic ultrasound waves are exploited to cyclically heat and deform the polymer at ultrasound frequencies. The melting of the polymer is then controlled by the friction heating at the contact points between the pellets and by the viscoelastic heating generated by the damping of the ultrasonic oscillation within the polymer itself [20,21].…”
Section: Introductionmentioning
confidence: 99%
“…Compared with the experimental results of trigger pressure, the height of PP, PA66, and PMMA samples decreased by 43.1%, 49.8%, and 47.3%, respectively, the influence of plasticizing pressure can be sequenced as PMMA ≈ PA66 > PP. The possible reason for the above results was that the temperature of the contact area of the pellet increases rapidly under interfacial friction [19,21,22]. The pressure of sonotrode makes the softened polymer fill the gap, the contact state of inter-pellets changes from point contact to face contact meanwhile.…”
Section: Height Of Plasticized Samplementioning
confidence: 96%
“…Michaeli believes that the energy source of ultrasonic plasticization mainly comes from frictional heat and viscoelastic heat, similar to ultrasonic welding [18]. We studied the mechanism of frictional heat generation and viscoelastic heat generation [19][20][21][22] and found that the interfacial frictional heat determines the temperature distribution during the initial stage of ultrasonic plasticization. Interfacial friction heat generation is the main energy source when the polymer pellets are at low temperatures.…”
Section: Introductionmentioning
confidence: 99%
“…Most of the research in the field agree that polymer plasticization depends on two main mechanisms: (a) The interfacial friction heating and (b) the volumetric or viscoelastic heating [16,18,33,34,35,36]. The interfacial friction occurs when particles have lateral movements among them, while the damping oscillation of the polymer chains causes the viscoelastic heating, due to inner friction.…”
Section: Ultrasonic Injection Moldingmentioning
confidence: 99%
“…Wu et al [33] and Jian et al [8] studied experimentally and numerically the characteristics of the interfacial friction heating and the viscoelastic heating mechanisms in ultrasonic plasticization of polymeric granules respectively. According to Wu et al [33] the interfacial friction phenomenon occurs only at the beginning of the ultrasonic plasticization process. It occurs in the interfaces among polymer granules ending until the interfaces disappear.…”
Section: Ultrasonic Injection Moldingmentioning
confidence: 99%