Synthesis and Properties of Cross-Linkable Waterborne Polyurethane/HMMM-CNT Nanocomposite

Abstract:

A series of cross-linked waterborne polyurethane/hexamethoxymethylmel-amine-carbon nanotube nanocomposites (WBPU/HMMM-CNT) were synthesized using carboxylic group functionalized CNT. The carboxylic groups on CNT were reacted with the methoxy groups of HMMM to get bonded HMMM-CNT. Unreacted methoxy group of HMMM-CNT was crosslinked with the carboxylic acid salt groups of WBPU and made crosslinked WBPU/HMMM-CNT nanocomposite. The mechanical properties (tensile strength and Young’s modulus) of conventional WBPU, crosslinked WBPU/HMMM, WBPU/CNT and WBPU/HMMM-CNT nanocomposites were compared under three conditions: untreated, wet and dried. It was observed that the mechanical properties of the crosslinked WBPU/HMMM-CNT nanocomposites were the least affected by water compared to conventional WBPU, crosslinked WBPU/HMMM, and WBPU/CNT nanocomposites. Differential scanning calorimetry (DSC) analysis also confirmed that the WBPU/HMMM-CNT nanocomposite can absorbed least water which can be easily removed by heating without destroying their crystalline structure. Crosslinked WBPU/HMMM-CNT nanocomposite recovered most of its mechanical properties of (with optimum HMMM-CNT content) after drying.

• Periodical: Nano Hybrids (Volume 7)
• Pages: 87-111
• DOI: https://doi.org/10.4028/www.scientific.net/NH.7.87
• Online since: August 2014
• Authors: Mohammad Mizanur Rahman*, M. Nasiruzzaman Shaikh
• Keywords: CNT, Crosslinking, Melamine, Polyurethane

References

[1] M.M. Rahman, H.D. Kim, Synthesis and characterization of waterborne polyurethane adhesives containing different amount of ionic groups (I), J. Appl. Polym. Sci. 102 (2006) 5684-5691.

DOI: 10.1002/app.25052

[2] M.M. Rahman, A. Hasneen, W.K. Lee, K.T. Lim, Preparation and properties of Sol-gel Waterborne Polyurethane Adhesives, J. Sol-gel. Sci. Technol. 67 (2013) 473-479.

DOI: 10.1007/s10971-013-3103-9

[3] J.K. Yun, H.J. Yoo, H.D. Kim, Preparation and properties of waterborne polyurethane-urea/sodium alginate blends for high water vapor permeable coating materials, J. Appl. Polym. Sci. 105 (2007) 1168-1176.

DOI: 10.1002/app.25731

[4] K. Mequanint, R. Sanderson, Nano-structure phosphorus-containing polyurethane dispersions: synthesis and crosslinking with melamine formaldehyde resin, Polymer 44 (2003) 2631-2639.

DOI: 10.1016/s0032-3861(03)00154-x

[5] M.M. Rahman, E.Y. Kim, J.Y. Kwon, H.J. Yoo, H.D. Kim, Cross-linking reaction of waterborne polyurethane adhesives containing different amount of ionic groups with hexamethoxymethyl melamine, Int. J. Adhes. Adhes. 28 (2008) 47-54.

DOI: 10.1016/j.ijadhadh.2007.03.004

[6] Y.S. Kwak, E.Y. Kim, B.H. Yoo, H.D. Kim, Preparation and properties of waterborne poly(urethane urea)s for adhesives: The effects of the 2,2-bis(hydroxylmethyl)propionic acid content on the properties, J. Appl. Polym. Sci. 94 (2004) 1743-1751.

DOI: 10.1002/app.21099

[7] J.E. Yang, Y.H. Lee, Y.S. Koo, Y.J. Jung, H.D. Kim, Preparation and properties of waterborne poly(urethane-urea) ionomers effect of the type of neutralizing agent, Fiber. Polym. 3 (2002) 97-102.

DOI: 10.1007/bf02892624

[8] B.S. Kim, B.K. Kim, Enhancement of hydrolytic stability and adhesion of waterborne polyurethanes, J. Appl. Polym. Sci. 97 (2005) 1961-1969.

DOI: 10.1002/app.21984

[9] M.M. Rahman, H.D. Kim, Effect of polyisocyanate hardener on adhesive force of waterborne polyurethane adhesives, J. Appl. Polym. Sci. 104 (2007) 3663-3669.

DOI: 10.1002/app.26170

[10] J.Y. Kwon, H.D. Kim, Comparison of the properties of waterborne polyurethane/multiwalled carbon nanotube and acid-treated multiwalled carbon nanotube composites prepared by in situ polymerization, J. Polym. Sci. Part A: Polym. Chem. 43 (2005) 3973-3985.

DOI: 10.1002/pola.20897

[11] J.H. Huh, M.M. Rahman, H.D. Kim, Properties of Waterborne Polyurethane/Clay Nanocomposite Adhesives, J. Adhes. Sci. Technol. 23 (2009) 739-751.

DOI: 10.1163/156856108x379191

[12] M.M. Rahman, E.Y. Kim, K.T. Lim, W.K. Lee, Morphology and Properties of Waterborne Polyurethane/CNT Nanocomposite Adhesives with Various Carboxyl Acid Salt Groups, J. Adhes. Sci. Technol. 23 (2009) 839-850.

DOI: 10.1163/156856109x411210

[13] X. Hong, Q. Chen, M. Chen, J. Chen, H. Liu, A novel coating by hybrid polymerization, Prog. Org. Coat. 45 (2002) 165-171.

[14] X. Hong, The effect of HMMM in a hybrid polymerization comprising free radical polymerization, Prog. Org. Coat. 26 (1995) 121-129.

DOI: 10.1016/0300-9440(95)00571-4

[15] P. Marino, C. Lowe, M.-L. Abel, J.F. Watts, Surface characterization of polyester resins formulated with different cross-linking agents, Surf. Interface Anal. 40(3) (2008) 137-141.

DOI: 10.1002/sia.2767

[16] L. Liu, Y. Qin, Z.-X. Guo, D. Zhu, Reduction of solubilized multi-walled carbon nanotubes, Carbon 41 (2003) 331-335.

DOI: 10.1016/s0008-6223(02)00286-5

[17] Y.-L. Wang, A.M. Mebel, C.-J. Wu, Y.-T. Chen, C.-E. Lin, J.-C. Jiang, IR spectroscopy and theoretical vibrational calculation of the melamine molecule, J. Chem. Soc Faraday Trans. 93 (1997) 3445-3451.

DOI: 10.1039/a701732d

[18] P.J. Larkin, M.P. Makowski, N.B. Colthup, L.A. Flood, Vibrational analysis of some important group frequencies of melamine derivatives containing methoxymethyl, and carbamate substituents: mechanical coupling of substituent vibrations with triazine ring modes, Vib. Spectrosc. 17 (1998) 53-71.

DOI: 10.1016/s0924-2031(98)00015-0

[19] Yu, X.; Kwon, E. A carbon nanotube/cement composite with piezoresistive properties, Smart Mater. Struct. 18 (2009) 055010:1–055010:5.

DOI: 10.1088/0964-1726/18/5/055010

[20] J.N. Deng, X.Q. Zhang, K. Wang, H. Zou, Q. Zhang, Q. Fu, Synthesis and properties of poly(ether urethane) membranes filled with isophorone diisocyanate-grafted carbon nanotubes, J. Membr. Sci. 288 (2007) 261-267.

DOI: 10.1016/j.memsci.2006.11.033

[21] H. Xia, M. Song, Preparation and characterization of polyurethane–carbon nanotube composites, Soft Matter 1 (2005) 386-394.

DOI: 10.1039/b509038e

[22] M.M. Rahman1, I. Lee, H.-H. Chun, H.D. Kim, H. Park, Properties of waterborne polyurethane-fluorinated marine coatings: The effect of different types of diisocyanates and tetrafluorobutanediol chain extender content, J. Appl. Polym. Sci. 131(4) (2014) 39905 (7 page).

DOI: 10.1002/app.39905

[23] M.M. Rahman, H.D. Kim, W.K. Lee, Properties of crosslinked waterborne polyurethane adhesives with modified melamine: Effect of curing time, temperature, and HMMM content, Fiber. Polym. 10 (1) (2009) 6-13.

DOI: 10.1007/s12221-009-0006-z

[24] R. Gref, Q.T. Nguyen, J. Rault, J. Néel, Etats des solvants absorbes dans des films semi-cristallins en alcool polyvinylique—I. Gonflement dans l'eau, Eur. Polym. J. 28(8) (1992) 1007-1014.

DOI: 10.1016/0014-3057(92)90332-v

[25] R. Iwamoto, M. Miya, S. Mima, Determination of crystallinity of swollen poly(vinyl alcohol) by laser Raman spectroscopy, J. Polym. Sci. B. Polym. Phys. 17(9) (1979) 1507-1515.

DOI: 10.1002/pol.1979.180170904

[26] A. Higuchi, T. Iijima, DSC investigation of the states of water in poly(vinyl alcohol) membranes, Polymer 26 (1985) 1207-1211.

DOI: 10.1016/0032-3861(85)90254-x

[27] A. Higuchi, T. Iijima, D.s.c. investigation of the states of water in poly(vinyl alcohol-co-itaconic acid) membranes, Polymer 26 (1985) 1833-1837.

DOI: 10.1016/0032-3861(85)90011-4

[28] E. Southern, A.G. Thomas, Diffusion of liquids in crosslinked rubbers. Part 1, Trans. Faraday Soc. 63 (1967) 1913-1921.

DOI: 10.1039/tf9676301913

[29] B. Alexandre, S. Marais, D. Langevin, P. Médéric, T. Aubry, Nanocomposite-based polyamide 12/montmorillonite: relationships between structures and transport properties, Desalination 199 (2006) 164-166.

DOI: 10.1016/j.desal.2006.03.035

[30] R. Stephen, S. Varghese, K. Joseph, Z. Oommen, S. Thomas, Diffusion and transport through nanocomposites of natural rubber (NR), carboxylated styrene butadiene rubber (XSBR) and their blends, J. Membr. Sci. 282 (2006) 162-170.

DOI: 10.1016/j.memsci.2006.05.019