EPDM/NBR 블렌드 가황체의 가교 거동, 영구 압축 줄음율 및 동적 기계적 성질

박찬영; Chan Young Park

Polymer(Korea), Vol.25, No.2, 233-239, March, 2001

Export Citation

EPDM/NBR 블렌드 가황체의 가교 거동, 영구 압축 줄음율 및 동적 기계적 성질

Cure Behavior, Compression Set and Dynamic Mechanical Properties of EPDM/NBR Blend Vulcanizates

박찬영

부경대학교 화학공학부

Chan Young Park

Division of Chemical Engineering, Pukyong National University, Pusan 608-739, Korea

초록

Mechanical mixing법으로 ethylene propylene diene terpolymer(EPDM)과 acrylonitrile butadiene rubber(NBR) 블렌드 혼련물을 제조하여, 이들의 무늬 점도, 가교 거동, 영구 압축 줄음율 및 동적 기계적 성질 등을 검토하였다. Rheovibron에 의한 동적 특성 측정의 결과로부터 EPDM/NBR 블렌드는 -43℃ 및 -4℃ 부근에서 두 개의 전이를 보였으며 이를 각각 NBR 고무 및 EPDM 고무의 T_g로 해석하였다. tanδ피크의 위치는 NBR 고무의 함량이 증가함에 따라 고온 쪽으로 이동함을 확인할 수 있었다. 또한 NBR 고무량이 증가할수록 최적 가황시간이 단축되는 경향을 보였다.

The ethylene propylene diene terpolymer (EPDM) blends with acrylonitrile butadiene rubber(NBR) were prepared by mechanical mixing method. Mooney viscosity, cure behaviors, compression set and dynamic mechanical properties were subsequently examined. Dynamic characteristics of the entire blends determined from a Rheovibron generally showed two glass transitions (T'(g)s), -43 ℃ and -4 ℃ for NBR and EPDM, respectively. The tan δ peak monotonically shifted toward the higher temperature with increasing NBR content. It was also found that the optimum cure time was significantly decreased with loading of NBR.

Keywords:mooney viscosity;dynamic mechanical properties;rheovibron;tan δ;optimum cure time

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[1] Akhtar S, De PP, De SK, J. Appl. Polym. Sci., 32, 5123 (1986)

[2] Gupta AK, Jain AK, Ratnam BK, Maiti SN, J. Appl. Polym. Sci., 39, 515 (1990)

[3] Kallitsis JK, Kalfoglou NK, J. Appl. Polym. Sci., 37, 453 (1989)

[4] Zanzig DJ, Magnus FL, Hsu WL, Halasa AF, Testa ME, Rubber Chem. Technol., 66, 538 (1993)

[5] Roland CM, Rubber Chem. Technol., 62, 456 (1989)

[6] Corish PJ, Powell BDW, Rubber Chem. Technol., 47, 481 (1974)

[7] Marinovic T, Sustar M, Pertot A, Susteric Z, Polym. Int., 45, 77 (1998)

[8] Woods MF, Davidson JA, Rubber Chem. Technol., 49, 112 (1976)

[9] ASTM Designation, D 2084 76T (1972)

[10] Cho DW, Yoon CH, J. Korean Ind. Rubber Ind., 27(4), 275 (1992)

[11] Mukhapodhyay S, De SK, J. Mater. Sci., 25, 4027 (1990)

[12] Manoj NR, De PP, Polymer, 39(3), 733 (1998)

[13] Botros SH, Abdel-Nour, Polym. Degrad. Stabil., 62, 479 (1998)