Article
  • A Study on Synthesis and Properties of Composite Latex by Stage-Emulsion Polymerization : 3. Physical Properties of PMMA/PS Composite
  • Lee MK, Kim KU, Moon TJ
  • 단계적 유화중합에 의한 Composite Latex의 합성과 그 물성에 관한 연구: 3.PMMA/PS Composite의 물성
  • 이미경, 김광웅, 문탁진
Abstract
The physical properties of poly(methyl methacrylate) (PMMA)/polystyrene(PS) latex composite were investigated and compared with those of latex blend. Composite latex was prepared by surfactant-free, two-stage emulsion polymerization and with potassium persulfate as an initiator. The tensile strength of synthesized latex composite was found to be stronger than that of latex blend, due to the phase morphology of fine dispersion which was maintained during the sample processing, rather than due to the difference in polymer characteristics such as molecular weight. According to the composition of latex composite, an appropriate processing condition was essential, because the viscosity of PS component, polymerized in second stage, varied with PMMA core/styrene ratio.

유화제를 사용하지 않는 2단계 유화중합법을 이용하고 potassium persulfate를 개시제로 하여 합성한 poly(methyl methacrylate) (PMMA)/polystyrene(PS)계 latex composite의 물성을 측정하고 latex blending과 비교하였다. 2단계로 합성한 composite는 latex blending의 경우보다 향상된 인장강도를 나타내었는데, 2단계에서 합성된 PS 성분의 분자량이 PS homopolymer 보다 큰 영향보다 입자 각각에서 미세한 phase가 형성되며 가공 후에도 이러한 미세 morphology가 유지되는 특성이 주된 이유로 보인다. 또한 PMMA core/styrene 조성에 따라 2단계에서 합성되는 PS 성분의 점도가 다르므로, composite의 조성에 따라 적절한 가공조건의 선택이 요구된다.

References
  • 1. Matsumoto T, Okubo M, Imai T, Kobunshi Ronbunshu, 31, 576 (1974)
  •  
  • 2. Lee DI, Am. Chem. Soc. Div. Org. Coat. Plast. Chem. Prep., 43, 622 (1980)
  •  
  • 3. Okubo M, Seike M, Matsumoto T, J. Appl. Polym. Sci., 28, 383 (1983)
  •  
  • 4. Okubo M, Katsuta Y, Matsumoto T, J. Appl. Polym. Sci., 36, 459 (1979)
  •  
  • 5. Okubo M, Katsuta Y, Matsumoto T, J. Polym. Sci. C: Polym. Lett., 20, 45 (1982)
  •  
  • 6. Okubo M, Ando A, Yamada A, Katsuta Y, Matsumoto T, J. Polym. Sci. C: Polym. Lett., 19, 143 (1981)
  •  
  • 7. Muroi S, Hashimoto H, Hosoi K, J. Polym. Sci. A: Polym. Chem., 22, 1365 (1984)
  •  
  • 8. Cho I, Lee KW, J. Appl. Polym. Sci., 30, 1903 (1985)
  •  
  • 9. Okubo M, Katsuta Y, Matsumoto T, J. Polym. Sci. C: Polym. Lett., 18, 481 (1980)
  •  
  • 10. Yamazaki S, Kobunshi Ronbunshu, 33, 664 (1976)
  •  
  • 11. Lee MK, Kim KU, Moon TJ, Polym.(Korea), 15(5), 563 (1991)
  •  
  • 12. Lee MK, Kim KU, Moon TJ, Polym.(Korea), 15(6), 670 (1991)
  •  
  • 13. Allen NSDegradation and Stabilization of Polymers, Chap. 3, Appl. Sci. Publishers Ltd., London (1983)
  •  
  • 14. Min TI, Klein A, El-Asser MS, Vanderhoff JW, J. Polym. Sci. A: Polym. Chem., 21, 2845 (1983)
  •  
  • 15. Braderup J, Immergut EHPolymer Handbook, 3rd ed., John Wiley and Sons (1989)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1991; 15(6): 678-686

    Published online Dec 25, 1991