폴리프로필렌/에틸렌옥텐 공중합체 블렌드의 상분리 구조 및 발포 특성

서관호; 임정철; Kwang-Ho Seo; Jeong-Cheol Lim

Polymer(Korea), Vol.25, No.5, 707-718, September, 2001

Export Citation

폴리프로필렌/에틸렌옥텐 공중합체 블렌드의 상분리 구조 및 발포 특성

Phase Morphology and Foaming of Polypropylene/Ethylene-octene Copolymer Blends

서관호^†, 임정철¹

경북대학교 고분자공학과
¹영남이공대학 텍스타일시스템계열

Kwang-Ho Seo^†, and Jeong-Cheol Lim¹

Department of Polymer Science, Kyungpook National University, Taegu 702-701, Korea
¹Division of Textile System, Yeungnam College of Science & Technology, Taegu 705-037, Korea

E-mail:

초록

폴리프로필렌(PP)은 낮은 밀도, 우수한 내열성, 내화학성, 가공성과 더불어 재활용이 용이한 플라스틱이다. 하지만 플리프로필렌의 발포에 대한 연구는 그리 많지 않다. 본 연구에서는 화학적 발포제를 사용하여 발포 폴리프로필렌을 만들고자 하였다. 폴리프로필렌의 가공온도에서 유동성과 발포체의 유연성을 높이기 위해 에틸렌/옥텐 공중합체(mPE)를 폴리프로필렌에 용융 블렌드하였다. 발포에 앞서 발포체의 발포배율과 셀구조에 미치는 상분리 거동의 영향을 알기 위해 PP/mPE 블렌드 상분리 거동을 조사하였다. PP/mPE 블렌드의 상 거동은 블렌드 조성과 mixing torque ratio, 그리고 mixing rpm에 영향을 받았다. PP 기질에 mPE가 분산상으로 존재하는 블렌드를 발포시켰을 때 높은 배율과 안정한 셀 구조를 가지는 발포체를 얻을 수 있었다.

Polypropylene(PP) exhibits many beneficial such as low density, high thermal stability, chemical resistance, good processability and recyclability. However, only limited research has been done on expanded polypropylene(EPP). In this study, we were trying to prepare EPP with chemical blowing agent. Ethylene-octene copolymer(mPE) was melt blended with PP to enhance melt fluidity of PP at processing temperature and to make more flexible foamed material. Prior to foaming, phase morphology of PP/mPE blends were investigated to examine the effect of phase morphology on the foaming ratio and cell structure of foams. Phase morphology of PP/mPE blends were affected by the content of mPE and mixing torque ratio. At the same composition, it was affected by mixing rpm. High blowing ratio and stable cell structure were obtained in the blend which has the continuous PP matrix with dispersed droplets of mPE.

Keywords:polyprophlene;ethylene-octene copolymer;foam;phase morphology

[References]

Rhee SB, Polym.(Korea), 10(5), 504 (1986)
Seo KH, Choi CH, Oh DH, Lim JC, Polym.(Korea), 18(4), 641 (1994)
Klemper D, Frisch KC, "Handbook of Polymeric Foams and Foam Technology", eds. by D. Klemper and K.C. Frisch, 3rd. Ed., p. 811, Hanser, New York (1991)
Dominhaus H, "Plastics for Engineers", p. 81, Hanser, New York (1993)
Colton JS, Materials Manufacturing Processes, 4, 253 (1989)
Dutta A, Cakmak M, Rubber Chem. Technol., 65, 778 (1991)
Choi CH, Yoo TW, Hong JH, Ro MH, Lim YS, Polym.(Korea), 20(3), 489 (1996)
Nakajima N, Shida M, Trans. Soc. Rheol., 10, 299 (1969)
Chung O, Coran AY, Rubber Chem. Technol., 70, 781 (1997)
Goodrich JE, Porter RS, Polym. Eng. Sci., 7, 45 (1967)
Danesi S, Porter RS, Polymer, 19, 448 (1978)
Romanini D, Gara Gnanai E, Marchetti E, New Polym. Materials, 56 (1978)
Addonizio ML, D'Orazio L, Mancarella C, Martuscelli E, J. Mater. Sci., 24, 2939 (1989)
Avgeropoulos GN, Weissert FC, Rubber Chem. Technol., 49, 93 (1976)
Mekhilef N, Antec 97', 2156 (1997)
Paul DR, Barlow JW, Rev. Macromol. Chem., C18, 109 (1980)

[Referenced By]

[1] Rhee SB, Polym.(Korea), 10(5), 504 (1986)

[2] Seo KH, Choi CH, Oh DH, Lim JC, Polym.(Korea), 18(4), 641 (1994)

[3] Klemper D, Frisch KC, "Handbook of Polymeric Foams and Foam Technology", eds. by D. Klemper and K.C. Frisch, 3rd. Ed., p. 811, Hanser, New York (1991)

[4] Dominhaus H, "Plastics for Engineers", p. 81, Hanser, New York (1993)

[5] Colton JS, Materials Manufacturing Processes, 4, 253 (1989)

[6] Dutta A, Cakmak M, Rubber Chem. Technol., 65, 778 (1991)

[7] Choi CH, Yoo TW, Hong JH, Ro MH, Lim YS, Polym.(Korea), 20(3), 489 (1996)

[8] Nakajima N, Shida M, Trans. Soc. Rheol., 10, 299 (1969)

[9] Chung O, Coran AY, Rubber Chem. Technol., 70, 781 (1997)

[10] Goodrich JE, Porter RS, Polym. Eng. Sci., 7, 45 (1967)

[11] Danesi S, Porter RS, Polymer, 19, 448 (1978)

[12] Romanini D, Gara Gnanai E, Marchetti E, New Polym. Materials, 56 (1978)

[13] Addonizio ML, D'Orazio L, Mancarella C, Martuscelli E, J. Mater. Sci., 24, 2939 (1989)

[14] Avgeropoulos GN, Weissert FC, Rubber Chem. Technol., 49, 93 (1976)

[15] Mekhilef N, Antec 97', 2156 (1997)

[16] Paul DR, Barlow JW, Rev. Macromol. Chem., C18, 109 (1980)