Preparation and Properties of UV Curabel Polyurethane Acrylates

Lee KH; Kim BK

Korea Polymer Journal, Vol.4, No.1, 1-8, April, 1996

UV curable polyurethane (PU) acrylates have been synthesized from polypropylene glycol (PPG), isophorone diisocyanate (IPDI), and three types of reactive diluents, i.e., 2-hydroxyethylacrylate (HEA), tripropyleneglycol diacrylate (TPGDA), and trimethylolpropane triacrylate (TMPTA). The effects of soft segment length, type and concentration of the reactive dilents on the mechanical and dynamic mechanical properties have been determined. When the soft segment length was short(750), the tensile strength (σ_b) decreased, and elongation at break (ε_b) generally increased with increasing HEA concentration, due to the inferior strength of HEA homopolymer and increased molecular weight between crosslinks (M_c). Initial modulus (E) σ_b increased and elongation at break (ε_b) decreased with an increase in TPGDA concentration, and the effect was more pronounced as the soft segment length was ecreased. Increase in hardness and σ_b by increasing the diluent concentration in PPG2000 based materials, was more pronounced with higher functionality diluent, due to the increased crosslinking density. The lower temperature glass transition peak of PU was not influenced by the TPGDA incorporation, whereas that of the higher temperature moved toward the higher temperature. This was interpreted in terms of compatibility of hard segments and acrylates due to their similar polarity and hydrogen bonding.

[References]

Schmidle CJ, J. Coat. Fabrics, 8, 10 (1978)
Nakagawa T, Wei J, Proc. Fourth Int'l, Conf. on Technol. of Plasticity (1993)
Ono H, Kawatsuki N, Jpn. J. Appl. Phys., 33, 6268 (1994)
Apeckhard TA, Hwang KKS, Lin SB, Tsay SY, Koshiba M, Ding Ys, Cooper SL, J. Appl. Polym. Sci., 30, 647 (1985)
Koshiba M, Hwang KKS, Foley SK, Yarusso DJ, Cooper SL, J. Mater. Sci., 17, 1447 (1982)
Yu X, Grady BP, Reiner RS, Cooper SL, J. Appl. Polym. Sci., 49, 1943 (1993)
Lilaonitkul A, Cooper SL, Advances in Urethane Science and Technology, K.C. Frisch and S.L. Reegen, Eds., Technomic, Westport, C.T. Vol. 7, pp. 163 (1979)
Bluestein C, Polym. Plast. Technol. Eng., 17, 83 (1981)
U.S. Patent, 2,993,789 (1961)
Randell DR, Radiation Curing of Polymers, Royal Society of Chemistry, London (1987)
Hoyle CE, Kinstle JF, Radiation Curing of Polymeric Materials, ACS Symposium Series 417, American Chemical Society, Washington D.C. (1990)
Crivello JV, Am. Chem. Soc. Div. Org. Coat. Prepr., 41, 560 (1979)
Kushner L, Tu RS, Mod. Plast., 60(4), 87 (1983)
Oraby W, Walsh WK, J. Appl. Polym. Sci., 23, 3227 (1979)
Oraby W, Walsh WK, J. Appl. Polym. Sci., 23, 3243 (1979)
Nakazoto S, Amari T, Yamaoko T, J. Appl. Polym. Sci., 38, 627 (1989)
Kim BK, Lee YM, Colloid Polym. Sci., 270, 956 (1992)
Malec EJ, David DJ, Analytical Chemistry of Polyurethanes, Wiley, New York (1969)
Abrate S, Rubber Chem. Technol., 59, 384 (1986)
Kim BK, Park SJ, J. Appl. Polym. Sci., 43, 357 (1991)
Lee JC, Kim BK, J. Polym. Sci. A: Polym. Chem., 32(10), 1983 (1994)
Lee YM, Lee JC, Kim BK, Polymer, 35(5), 1095 (1994)
Petrovic ZS, Soda-So IJ, J. Polym. Sci. B: Polym. Phys., 27, 545 (1989)
Kim BK, Lee JC, Lee KH, J. Macromol. Sci.-Pure Appl. Chem., A31, 1241 (1994)
Lin SB, Tsay SY, Speckhard TA, Hwang KKS, Jezerc JJ, Cooper SL, Chem. Eng. Commun., 30, 251 (1984)
Joseph EG, Wilkes GL, Park K, Polym. Prepr., 20, 520 (1979)
Kim BK, Lee KH, Polymer, in press
Kim BK, Lee KH, J. Polym. Sci. A: Polym. Chem., in press

[Referenced By]

[1] Schmidle CJ, J. Coat. Fabrics, 8, 10 (1978)

[2] Nakagawa T, Wei J, Proc. Fourth Int'l, Conf. on Technol. of Plasticity (1993)

[3] Ono H, Kawatsuki N, Jpn. J. Appl. Phys., 33, 6268 (1994)

[4] Apeckhard TA, Hwang KKS, Lin SB, Tsay SY, Koshiba M, Ding Ys, Cooper SL, J. Appl. Polym. Sci., 30, 647 (1985)

[5] Koshiba M, Hwang KKS, Foley SK, Yarusso DJ, Cooper SL, J. Mater. Sci., 17, 1447 (1982)

[6] Yu X, Grady BP, Reiner RS, Cooper SL, J. Appl. Polym. Sci., 49, 1943 (1993)

[7] Lilaonitkul A, Cooper SL, Advances in Urethane Science and Technology, K.C. Frisch and S.L. Reegen, Eds., Technomic, Westport, C.T. Vol. 7, pp. 163 (1979)

[8] Bluestein C, Polym. Plast. Technol. Eng., 17, 83 (1981)

[9] U.S. Patent, 2,993,789 (1961)

[10] Randell DR, Radiation Curing of Polymers, Royal Society of Chemistry, London (1987)

[11] Hoyle CE, Kinstle JF, Radiation Curing of Polymeric Materials, ACS Symposium Series 417, American Chemical Society, Washington D.C. (1990)

[12] Crivello JV, Am. Chem. Soc. Div. Org. Coat. Prepr., 41, 560 (1979)

[13] Kushner L, Tu RS, Mod. Plast., 60(4), 87 (1983)

[14] Oraby W, Walsh WK, J. Appl. Polym. Sci., 23, 3227 (1979)

[15] Oraby W, Walsh WK, J. Appl. Polym. Sci., 23, 3243 (1979)

[16] Nakazoto S, Amari T, Yamaoko T, J. Appl. Polym. Sci., 38, 627 (1989)

[17] Kim BK, Lee YM, Colloid Polym. Sci., 270, 956 (1992)

[18] Malec EJ, David DJ, Analytical Chemistry of Polyurethanes, Wiley, New York (1969)

[19] Abrate S, Rubber Chem. Technol., 59, 384 (1986)

[20] Kim BK, Park SJ, J. Appl. Polym. Sci., 43, 357 (1991)

[21] Lee JC, Kim BK, J. Polym. Sci. A: Polym. Chem., 32(10), 1983 (1994)

[22] Lee YM, Lee JC, Kim BK, Polymer, 35(5), 1095 (1994)

[23] Petrovic ZS, Soda-So IJ, J. Polym. Sci. B: Polym. Phys., 27, 545 (1989)

[24] Kim BK, Lee JC, Lee KH, J. Macromol. Sci.-Pure Appl. Chem., A31, 1241 (1994)

[25] Lin SB, Tsay SY, Speckhard TA, Hwang KKS, Jezerc JJ, Cooper SL, Chem. Eng. Commun., 30, 251 (1984)

[26] Joseph EG, Wilkes GL, Park K, Polym. Prepr., 20, 520 (1979)

[27] Kim BK, Lee KH, Polymer, in press

[28] Kim BK, Lee KH, J. Polym. Sci. A: Polym. Chem., in press