접합 조건에 따른 무정형 동종 고분자 접합면의 접착강도에 관한 연구

정연호; 강두환; 강호종

Polymer(Korea), Vol.21, No.5, 755-763, September, 1997

Export Citation

접합 조건에 따른 무정형 동종 고분자 접합면의 접착강도에 관한 연구

Autoadhesion Strength of Symmetric Amorphous Interface in Polymer Welding Process

정연호, 강두환, 강호종

초록

고분자 welding 가공시 무정형 고분자 계면의 autoadhesion 현상을 butt joints 실험을 통하여 가공조건에 따른 접착강도의 변화로서 살펴보았다. 접착온도의 증가에 따라 접착강도가 증가하였으며 이러한 증가는 온도의 의존성을 갖는 주쇄의 계면 확산에 기인함을 알 수 있었다. 접착강도는 접착시간에 1/4승에 비례하며 접착시간이 증가하여도 더 이상 강도가 증가하지 않는 cohesive strength를 갖음을 알 수 있었으며 이러한 cohesive strength는 접착가공시 냉각조건을 조절함에 따라 증가시킬 수 있음을 확인하였다. 접착압력은 상대적으로 접착시간에 비하여 접착강도에 미치는 영향이 적으며 임계 압력이 존재함을 알 수 있었다. 아울러 분자량이 작을수록 접착강도가 증가되나 이러한 분자량은 최소 entanglemunt molecular weight이상 되어야함을 확인하였다.

Autoadhesion phenomena in the amorphous polymer interface was investigated by the consideration of welding parameter dependency on autoadhesion strength using butt joint tests. Increasing welding temperature made better molecular diffusion in the interface resulting in the higher autoadhesion strength. Autoadhesion strength had a linear dependency on t_1/4(contact time) The cohesive strength which Is invariant with the contact time was obtained and it could be controlled by the cooling procedure In the polymer welding. The effect of welding pressure on autoadhesion strength was less than that of contact time since the area of contact at the interface was increased with increasing pressure until full intimated contact was achieved. Above the entanglement molecular weight, the interface with less molecular weight resulted in better autoadhesion strength.

Keywords:autoadhesion strength;polymer interface;butt joint;molecular diffusion

[References]

Voyutskii SS, "Autohesion and Adhesion of High Polymer," vol. 4, Polymer Review, Interscience Publishers, New York (1963)
Wool RP, J. Polym. Sci. C: Polym. Lett., 20, 7 (1982)
Pauling L, "The Nature of Chemical Bonding," Cornell University Press, New York (1960)
deGennes PG, J. Chem. Phys., 55, 572 (1971)
deGennes PG, Physic Today, 33 (1983)
Edward SF, Proc. Phys. Soc., 92, 9 (1967)
Jud K, Kausch HH, Williams JG, J. Mater. Sci., 16, 204 (1981)
Wool RP, O'Connor KM, J. Appl. Phys., 52, 5953 (1981)
Wool RP, Rubber Chem. Technol., 57, 307 (1983)
Wool RP, Yuan BL, McGarel OJ, Polym. Eng. Sci., 29, 1340 (1989)
O'Connor KM, Wool RP, Bull. APS, 30, 389 (1985)
Hamed GR, Shieh CH, J. Polym. Sci. B: Polym. Phys., 21, 1415 (1983)
Chang RJ, J. Polym. Sci. B: Polym. Phys., 19, 1619 (1981)
Kline DB, Wool RP, Polym. Eng. Sci., 28, 52 (1988)
ASTM Glossary of ASTM Definition, 2nd Ed., Amerecian Society of Testing and Materials, Philadelphia (1973)

[Referenced By]

[1] Voyutskii SS, "Autohesion and Adhesion of High Polymer," vol. 4, Polymer Review, Interscience Publishers, New York (1963)

[2] Wool RP, J. Polym. Sci. C: Polym. Lett., 20, 7 (1982)

[3] Pauling L, "The Nature of Chemical Bonding," Cornell University Press, New York (1960)

[4] deGennes PG, J. Chem. Phys., 55, 572 (1971)

[5] deGennes PG, Physic Today, 33 (1983)

[6] Edward SF, Proc. Phys. Soc., 92, 9 (1967)

[7] Jud K, Kausch HH, Williams JG, J. Mater. Sci., 16, 204 (1981)

[8] Wool RP, O'Connor KM, J. Appl. Phys., 52, 5953 (1981)

[9] Wool RP, Rubber Chem. Technol., 57, 307 (1983)

[10] Wool RP, Yuan BL, McGarel OJ, Polym. Eng. Sci., 29, 1340 (1989)

[11] O'Connor KM, Wool RP, Bull. APS, 30, 389 (1985)

[12] Hamed GR, Shieh CH, J. Polym. Sci. B: Polym. Phys., 21, 1415 (1983)

[13] Chang RJ, J. Polym. Sci. B: Polym. Phys., 19, 1619 (1981)

[14] Kline DB, Wool RP, Polym. Eng. Sci., 28, 52 (1988)

[15] ASTM Glossary of ASTM Definition, 2nd Ed., Amerecian Society of Testing and Materials, Philadelphia (1973)