Title Page
Abstract
국문요약
Contents
1. Introduction 11
2. Materials and methods 14
2.1. Inverse vulcanization of sulfur copolymers 14
2.2. Thermal treatment and film fabrication of sulfur copolymers 14
2.3. Characterization of sulfur copolymers after thermal treatment 15
3. Results and discussion 15
3.1. Process to achieve high homogeneity in poly(S₇₀-DVB₃₀) 15
3.2. Thermal treatment for poly(S₇₀-DVB₃₀) 18
3.3. Chemical structure conversion following thermal treatment 21
3.4. Thermal and mechanical properties of poly(S₇₀-DVB₃₀) 23
3.5. Chemical shifts of poly(S₇₀-DVB₃₀) during thermal treatment 28
4. Conclusions 29
5. Supplementary information 31
6. References 34
Figure 1. a) Synthesis process of poly(S₇₀-DVB₃₀). b) The chemical structure of poly(S₇₀-DVB₃₀) during the synthesis process. c) Schematic diagram of preparing poly(S₇₀-DVB₃₀) film... 16
Figure 2. a) Digital images of poly(S₇₀-DVB₃₀) powder and films at two different grinding temperatures. b) Digital image of poly(S₇₀-DVB₃₀) film. c) FT-IR transmittance data according... 18
Figure 3. Color variations in poly(S₇₀-DVB₃₀) films after thermal treatment under various conditions. Logo diameter, 3 cm. 19
Figure 4. a) Weight loss of poly(S₇₀-DVB₃₀) powder during thermal treatment. b) DSC thermograms of elemental sulfur, untreated poly(S₇₀-DVB₃₀), and accumulated substance after... 20
Figure 5. Mechanisms of structural changes in thermomechanical properties. 22
Figure 6. DSC thermogram of poly(S₇₀-DVB₃₀) films thermally treated at a) 110 ℃, b) 140 ℃, and c) 170 ℃. d) Calculated Tg of poly(S₇₀-DVB₃₀) films at DSC 2nd heating cycle. e) DSC...[이미지참조] 24
Figure 7. a) Measured Tg of poly(S₇₀-DVB₃₀) films by maximum tan δ from DMA results. b) Tg and Tₚ of poly(S₇₀-DVB₃₀) films after thermal treatment at 110 and 140 ℃ for 6 h. c) The...[이미지참조] 26
Figure 8. FT-IR spectra of poly(S₇₀-DVB₃₀) films at various thermal treatment temperatures and times: a) 110 ℃, b) 140 ℃, and c) 170 ℃. d) Peak ratio of aromatic C-C stretching without... 28
Figure S1. a) TGA curve of untreated poly(S₇₀-DVB₃₀). b) EDX data on the surface of untreated poly(S₇₀-DVB₃₀) and poly(S₇₀-DVB₃₀) thermally treated at 140 ℃ for 12, 24, and 48 h. 31
Figure S2. Digital image of poly(S₇₀-DVB₃₀) chunk. Scale bar, 1 cm. 31
Figure S3. Deconvolution of FT-IR spectra of poly(S₇₀-DVB₃₀) films thermally treated at 110 ℃ for different treatment times: a) Untreated, b) 2 h, c) 12 h, and d) 48 h. 32
Figure S4. Deconvolution of FT-IR spectra of poly(S₇₀-DVB₃₀) films thermally treated at 140 ℃ and 170 ℃ for each treatment time. 33