Korean Chemical Engineering Research

  • 제50권3호
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  • Pages.588-593
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  • 2012
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
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저수축제 폴리스틸렌과 불포화 폴리에스터 수지를 사용한 Sheet Molding Compound 제조 및 특성

Preparation and Characteristic of Sheet Molding Compound using Unsaturated Polyester Resin with Low Profile Agent of Polystyrene

  • 투고 : 2011.12.14
  • 심사 : 2012.02.26
  • 발행 : 2012.06.01
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초록

불포화 폴리에스터(unsaturated polyester, UP)와 저수축제(low profile agent, LPA), 폴리스틸렌(polystyrene, PS)과의 compatibility가 불포화 폴리에스터와 저수축제의 비율, 혼합시간, 혼합온도 그리고 추가로 투입되는 불포화 폴리에스터 수지량과 같은 다양한 조건하에서 확인되었다. 1단계로 1700 rpm의 교반속도에서 제조된 수지 혼합액의 경우, 불포화 폴리에스터 수지(unsaturated polyester resin, UPR) 투입량 25 g, 약 $30^{\circ}C$의 반응온도에서 상대적으로 작은 입자 크기 및 상분리율을 나타내었다. 2단계 수지 혼합액의 경우, 2차로 투입된 45 g의 불포화 폴리에스터 수지 혼합액에서 향상된 compatibility를 보였다. 이러한 결과는 혼합조건이 불포화 폴리에스터 수지와 저수축제 혼합액의 compatibility에 중요한 역할을 한다는 것을 의미한다. 또한, 상기조건을 통해 제조된 sheet molding compound (SMC)를 사용해서 만든 샘플은 흡수율, 수축율 및 광택도에서 향상된 결과를 나타내었다.

Compatibility of unsaturated polyester (UP) and low profile agent (LPA) of polystyrene (PS) have been investigated under various mixing conditions such as the ratio of UP and LPA, mixing time, mixing temperature, and input amount of 2nd UP. It was possible to obtain mixture with small particle size and low phase separation in condition of 35 g of LPA, 25 g of 1st UP input, 5 min of mixing time, 1700 rpm of mixing speed, and 45 g of 2nd UP input. It was found that compatibility of UP and LPA was very sensitive to mixing conditions. In addition, molded sample using sheet molding compound prepared by stable mixing condition appeared good properties such as low water adsorption, low shrinkage, and high gloss.

키워드

과제정보

연구 과제 주관 기관 : 중소기업청

참고문헌

  1. Cherian, A. B. and Thachil, E. T., "Block Copolymers of Unsaturated Polyesters and Functional Elastomers," J. Appl. Polym. Sci., 94(5), 1956-1964(2004). https://doi.org/10.1002/app.21083
  2. Atkins, K. E., Sheet Molding Compound: Science and Technology, Chapter 4, H. G. Kia, ed., Hanser Publishers, New York(1993).
  3. Brady, M. and Brady, P, "Automotive Composites: Which Way Are We Going?," Reinforced Plastics(2007).
  4. Kalny, O., Peterman, R. J. and Ramirez, G., "Performance Evaluation of Repair Technique for Damaged Fiber-reinforced Polymer Honeycomb Bridge Deck Panels," J. Bridge Eng., 9, 75-86(2004). https://doi.org/10.1061/(ASCE)1084-0702(2004)9:1(75)
  5. Vivek Patel, "Opportunity for Composite Materials in India: Sheet Molding Compound (SMC) Industry," 20(2010).
  6. Li, W. and Lee, L. J., "Shrinkage Control of Low-profile Unsaturated Polyester Resins Cured at Low Temperature," Polym. J., 39, 5677-5687(1998). https://doi.org/10.1016/S0032-3861(98)00074-3
  7. Lucas, J. C., Borrajo, J. and Williams, R. J., "Cure of Unsaturated Polyester Resins: 2. Influence of Low-profile Additives and Fillers on the Polymerization Reaction, Mechanical Properties and Surface Rugosities," Polym. J., 34, 1886-1890(1993). https://doi.org/10.1016/0032-3861(93)90430-I
  8. Li, W. and Lee, L. J., "Low Temperature Cure of Unsaturated Polyester Resins with Thermoplastic Additives III. Modification of Polyvinyl Acetate for Better Shrinkage Control," Polym. J., 41, 711-717(2000). https://doi.org/10.1016/S0032-3861(99)00179-2
  9. Haider, M. et al., "Cure Shrinkage Characterization and Modeling of a Polyester Resin Containing Low Profile Additives," Compos. Pt. A 38, 994-1009(2007). https://doi.org/10.1016/j.compositesa.2006.06.020
  10. Pegoretti, A., Ashkar, M., Migliaresi, C. and Marom, G., "Relaxation Processes in Polyethylene Fiber-reinforced Polyethylene Composites," Compos. Sci. Technol., 60, 1181-1189(2000). https://doi.org/10.1016/S0266-3538(00)00024-5
  11. Huang, Y. J. and J. S. Leu, "Curing of Unsaturated Polyester Resins. Effect of Temperature and Initiator: 1. Low Temperature Reactions," Polym. J., 34, 295-304(1993). https://doi.org/10.1016/0032-3861(93)90080-T
  12. Zhang, Z. and Zhu, S., "Microvoids in Unsaturated Polyester Resins Containing Poly(vinyl acetate) and Composites with Calcium Carbonate and Glass Fibers," Polym. J., 41, 3861-3870(2000). https://doi.org/10.1016/S0032-3861(99)00540-6
  13. Huang, Y. J. and Su, C. C., "Effects of Poly(vinyl acetate) and Poly(methyl methacrylate) Low-profile Additives on The Curing of Unsaturated Polyester Resins II. Morphological Changes during Cure," J. Appl. Polym. Sci., 55, 323-342(1995). https://doi.org/10.1002/app.1995.070550215
  14. Lee, D. S. and Han, C. D., "Effect of The Chemical Structure of Low-profile Additives on The Curing Behavior and Chemorheology of Unsaturated Polyester Resin," Poly Eng Sci., 27, 964-975(1987). https://doi.org/10.1002/pen.760271307
  15. Yang, Y. S. and Suspene, L., "Curing Unsaturated Polyester Resins: Viscosity Studies and Simulations in Pre-gel State," Poly Eng Sci., 31, 321-332(1991). https://doi.org/10.1002/pen.760310505
  16. Cao, X. and Lee, L. J., "Control of Shrinkage and Residual Styrene of Unsaturated Polyester Resins cured at Low Temperatures: I. Effect of Curing Agents," Polym. J., 44, 1893-1902(2003). https://doi.org/10.1016/S0032-3861(03)00014-4

피인용 문헌

  1. Characteristics of Polyester Polymer Concretes Using Spherical Aggregates from Industrial By-Products (III) (Using an Atomizing Steel Slag as a Filler and Fine Aggregate) vol.26, pp.1, 2015, https://doi.org/10.14478/ace.2014.1131
  2. Properties of Randomly Oriented Chopped E-glass Reinforced Unsaturated Polyester Based Resin Composite -Effect of Length/Content of E-Glass Fiber and Number of Stacking- vol.27, pp.3, 2015, https://doi.org/10.5764/TCF.2015.27.3.165
  3. Characteristics of Polyester Polymer Concrete Using Spherical Aggregates from Industrial By-Products(II)(Use of Fly Ash and Atomizing Reduction Steel Slag) vol.53, pp.3, 2015, https://doi.org/10.9713/kcer.2015.53.3.364
  4. 수지 및 탄소섬유 함유량에 따른 C-SMC 복합재료 물성 연구 vol.32, pp.4, 2020, https://doi.org/10.5764/tcf.2020.32.4.245