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이 論文을 李錫仁의 碩士學位論文으로 認定함. 2009年 2月主審副審委員
Abstract Recently, due to the environmental problems caused by synthetic non-degradable plastic waste, biodegradable polymers have received extensive attention as the potential candidate to replace the non- degradable counterparts. One of the promising synthetic aliphatic polyesters is poly(butylene succinate) (PBS), which has a high melting temperature (115 o C), good biodegradability by microorganism, and outstanding processability. However, it is known that its tensile properties, gas barrier properties and melt viscosity for further processing are not quite desirable in some end-use applications. In the polymer nanocomposite foam, the nanoscale filler distributed in the polymer matrix may act as the nucleation site during the foaming process, inducing smaller cell size and increased cell density. In addition, the presence of well-dispersed fillers can improve mechanical and physical properties, and the heat distortion temperature of polymer foams. The cell morphology, which depends strongly on the interaction with the filler, is expected to affect such characteristic properties as weight, specific strength, heat conductivity and isolation to sound. The purpose of this study is to develop the biodegradable polymer nanocomposite foam having high blowing ratio and closed-cell i
Page 1 and 2: 저작자표시-비영리-변경금
Page 3: 工學碩士學位論文 Pol
Page 7 and 8: 국 문 요 약 최근 비분해성
Page 9 and 10: CONTENTS Abstract ……………
Page 11 and 12: SECTION I. LIST OF TABLES Table 1 M
Page 13 and 14: SECTION II. Figure 1 TGA thermogram
Page 15 and 16: matrix. However, CNTs are strongly
Page 17 and 18: efficiency of different particles,
Page 19 and 20: 2. 1. Materials 2. Experimental The
Page 21 and 22: epresent the mass fraction of MWNTs
Page 23 and 24: The foam density was measured by a
Page 25 and 26: compared with Figure 2c. Therefore,
Page 27 and 28: decreased slightly but increased gr
Page 29 and 30: 3. 5. Foam behaviors and cell geome
Page 31 and 32: Figure 9 illustrates the variation
Page 33 and 34: mixing, and solution blending. Furt
Page 35 and 36: [11] Kannan Balasubramanian, Marko
Page 37 and 38: [28] Lakshmi S. Nair, Cato T. Laure
Page 39 and 40: SECTION II. Preparation and Charact
Page 41 and 42: chemical blowing agent, and to char
Page 43 and 44: vacuo at 60 ºC for 6 h to remove a
Page 45 and 46: were at least performed for each na
Page 47 and 48: nanocomposites enhanced greatly wit
Page 49 and 50: phr CBA loading was observed via op
Page 51 and 52: 3 the density of neat PBS (1.268 g/
Page 53 and 54: 5. References [1] D. Klempner and K
Page 55 and 56:
SECTION I. Processing of Poly(butyl
Page 57 and 58:
Table 2 Temperature and CBA content
Page 59 and 60:
Figure 2 SEM images of the PBS nano
Page 61 and 62:
Figure 4 DSC traces of the PBS nano
Page 63 and 64:
Figure 6 Optical micrographs of PBS
Page 65 and 66:
Figure 8 Blowing ratio of PBS nanoc
Page 67 and 68:
Figure 2 The effect of CNFs content
Page 69 and 70:
Figure 4 The effect of blowing time
Page 71:
Figure 6 Cell size distribution of
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