펙틴/전분 블렌드 필름의 기계적 물성 및 형태학

신부영

Journal of the Korean Industrial and Engineering Chemistry, Vol.10, No.7, 1008-1013, November, 1999

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펙틴/전분 블렌드 필름의 기계적 물성 및 형태학

Mechanical Properties and Morphology of Pectin/Starch Blend Films

신부영

초록

펙틴/전분 블렌드의 열가소성과 펙틴/전분 비와 가소제 함량이 블렌드의 기계적 물성과 형태에 미치는 영향을 조사하였다. 블렌드는 이축 압출기로 제조하였으며 시험용 필름은 슬릿 다이가 부착된 일축 압출기로 제조하였다. 대부분의 블렌드는 열가소성 성질을 가지고 있었으나, 펙틴/전분비가 아주 높은 블렌드는 열가소성 성질이 매우 약하였다. 필름의 인장 물성은 가소제인 글리세롤의 함량에는 크게 변화였으나 펙틴/전분 비의 변화에 대하여는 상대적으로 적게 변화하였다. 습조성 블렌드의 DSC 곡선은 125^oC에서 유리전이온도와 유사한 전이온도를 포함하고 있었다. 파단면의 전자현미경사진은 펙틴과 전분의 계면에서는 접착 현상이 좋다는 것을 보여주었다.

Mechanical properties and morphology of pectin/starch blend films depending upon the composition and plasticizer ratio were studied. Blends were prepared continuously in a twin-screw extruder. Films were prepared using a single-screw extruder with slit die. Most of the blends showed a good themoplastic behavior, while the blends with very high ratio of pectin/starch had a poor themoplasticity. Tensile properties of blend films were changed significantly by the amount of glycerol and relatively little by the ratio of pectin/starch, Differential scanning calorimetry (DSC) curves of wet blends showed a transition similar to glass transition temperature(T_g) at about 125℃. It was found by Scanning electron microscopy(SEM) study that there exists a good interfacial adhesion between pectin and starch.

Keywords:pectin;starch;blend;morphology;mechanical property

[References]

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[1] Narayan R, "Biodegradable Plastics and Polymers," Eds. Y. Doi and K. Fukuda, p. 261, Elsevier Science, Osaka (1994)

[2] Narayan R, "Polymers from Agricultural Coproducts," Eds. M.L. Fishman, R.B. Friedman and S.J. Huang, ACS Symposium Series 575, Chap. 1, Washington DC (1994)

[3] Meicier C, "Food Processing Engineering," P. Linko, Y. Mallky and J. Olkku Eds., 1, p. 75, Applied Publisher, Ltd., London (1980)

[4] Wiedmann W, Strobel E, Starch/Starke, 43, 138 (1991)

[5] Shogren RL, Fanta GF, Doane WM, Starch/Starke, 45, 276 (1993)

[6] Roper H, Koch H, Starch/Starke, 42, 123 (1990)

[7] Doane WM, Starch/Starke, 44, 293 (1992)

[8] Flexman EA, Kelly WE, U.S. Patent, 5,498,650 (1996)

[9] Bloembergen S, David J, Geyer D, Gustafson A, Snook J, Narayan R, "Biodegradable Plastics and Polymers," Eds. Y. Doi and K. Fukuda, p. 601, Elsevier Science, Osaka (1994)

[10] Coffin DR, Fishman ML, J. Appl. Polym. Sci., 54(9), 1311 (1994)

[11] Coffin DR, Fishman ML, Cooke PH, J. Appl. Polym. Sci., 57(6), 663 (1995)

[12] "Properties of Polymers," Eds. D.W. Vankrevelene and P.J. Hoftyzer, Elsevier Scientific Publishing Company, New York (1976)

[13] Fishman ML, Coffin DR, Unruh JJ, Ly T, J. Macromol. Sci.-Pure Appl. Chem., A33, 639 (1996)

[14] Koenig MF, Huang SJ, Polymer, 36(9), 1877 (1995)