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and the ‘S’ stand for solution blending, ‘M’ for melt mixing, and ‘SM’ for the SOAM method. 2. 3. Foaming After the dried solution casting films with different content of CNFs were fed into the torque rheometer and mixed at 120 ºC for 10 min at a speed of 60 rpm, ACP-4 varied from 4 to 8 phr was added to the brabender and subsequently melt-compounded for 10 min. The samples of the strip type (dimensions 12 mm × 20 mm × 3 mm) were obtained by using the heating press at 135 ºC for 8 min. Then, the nanocomposite foams were prepared in forced convection oven at 150, 160 and 170 ºC for 5, 10, 20 and 30 min on the Teflon film. 2. 4. Characterization of nanocomposites and their foams The thermal gravimetric analysis (TGA) was performed on a TA Instruments Q50 under air atmosphere using a heating rate of 20 ºC/min from room temperature to 700 ºC. The tensile strength and elongation at break of nanocomposites were measured by using Hounsfield Test Equipment at room temperature with the dog-bone samples. The strain rate was 26 mm/min, and seven measurements 31
were at least performed for each nanocomposite. The dispersion of CNFs in the PBS matrix was compared by field emission scanning electron microscopy (FE-SEM) using Hitachi S4300 at 15 kV. The surface morphology of nanocomposite foams was examined by an optical microscopy using Sometech i-Camscope. The density of nanocomposite foams was measured by using Micrometrics Co. Accupyc 1330 gas pycnometer. 32
Page 1 and 2: 저작자표시-비영리-변경금
Page 3 and 4: 工學碩士學位論文 Pol
Page 5 and 6: Abstract Recently, due to the envir
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: vacuo at 60 ºC for 6 h to remove a
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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