CAVITATION IN MELT OF POLYMERS
Introduction Cavitation is known to be a phenomenon in a liquid of generating the bubble (cavity) including the vapor of the liquid or the content gas, when the pressure much decreases locally in the liquid that flows at high speed. On the melt crystallization of polymers, it has been reported that a rapid volume contraction because of the density difference between crystal and amorphous at the crystallization generates cavities in an amorphous part confined in closed space surrounded by substrates and crystals. Now, we found that cavitation can be also observed in static polymer melts (and not confined in closed space) only sandwiched between two slide glasses in heating process after quenching to below the glass transition temperature without crystallization. The cavitation is a very interesting phenomenon, but the physical mechanism is not clear. Thus the aim of this work is to clarify the mechanism of the cavitation.
Nam LIN Masato HASHIMOTO Susumu FUJIWARA Takashi ITOH
Department of Macromolecular Science and Engineering,Graduate School of Science and Technology,Kyoto Institute of Technology,Matsugasaki,Sakyo-ku Kyoto-city Kyoto 606-8585,Japan
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
64-65
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）