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http://dx.doi.org/10.12772/TSE.2013.50.258

Controlling Molecular Interactions between Polyurethane Copolymers by Grafting Isopropyl Functional Groups  

Chung, Yong-Chan (Department of Chemistry, The University of Suwon)
Choi, Jae Won (Department of Nano Engineering, Inje University)
Lee, Hye Lim (Department of Chemistry, The University of Suwon)
Chun, Byoung Chul (Department of Nano Engineering, Inje University)
Publication Information
Textile Science and Engineering / v.50, no.4, 2013 , pp. 258-265 More about this Journal
Abstract
Grafted isopropyl groups were used to control the molecular interactions between polyurethane (PU) copolymers, and their effect on the tensile properties of PU was investigated. The grafted isopropyl groups were selected to interrupt the molecular interactions and disturb the close contact between PU chains through its branched structure, and thus improve the low-temperature recovery while maintaining the high tensile properties and the shape recovery at ambient temperature. The grafted isopropyl groups made a difference to the phase separation of the hard and soft segments in the PU structure, as determined by IR and DSC. The crosslink density and viscosity experienced an unusual increase with the increase in isopropyl content owing to crosslinking by the grafting reagent. The shape recovery and retention remained high even with the grafted isopropyl groups. Finally, the effect of the isopropyl groups on low-temperature recovery was compared with that of the linear PU, and the reason for the flexibility is discussed.
Keywords
isopropyl; low-temperature recovery; grafting; polyurethane;
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1 S. Mondal and J. L. Hu, "Free Volume and Water Vapor Permeability of Dense Segmented Polyurethane Membrane", J Membrane Sci, 2006, 280, 427-432.   DOI   ScienceOn
2 L. Rueda-Larraz, B. Fernandez d'Arlas, A. Tercjak, A. Ribes, I. Mondragon, and A. Eceiz, "Synthesis and Microstructure-Mechanical Property Relationships of Segmented Polyurethanes Based on a PCL-PTHF-PCL Block Copolymer as Soft Segment", Eur Polym J, 2009, 45, 2096-2109.   DOI   ScienceOn
3 C. T. Wright and D. R. Paul, "Gas Sorption and Transport in Poly(tertiary butylmethacrylate)", Polymer, 1997, 38, 1871-1878.   DOI   ScienceOn
4 W. Lequieu and F. E. Du Prez, "Segmented Polymer Networks Based on Poly(N-isopropyl acrylamide) and Poly(tetrahydrofuran) as Polymer Membranes with Thermo Responsive Permeability", Polymer, 2004, 45, 749-757.   DOI   ScienceOn
5 H. Kesim, Z. M. O. Rzaev, S. Dincer, and E. Piskin, "Functional Bioengineering Copolymers. II. Synthesis and Characterization of Amphiphilic Poly(N-isopropyl acrylamideco- maleic anhydride) and Its Macrobranched Derivatives", Polymer, 2003, 44, 2897-2909.   DOI   ScienceOn
6 A. Saeed, D. M. R. Georget, and A. G. Mayes, "Synthesis, Characterisation and Solution Thermal Behaviour of a Family of Poly(N-isopropyl acrylamide-co-N-hydroxymethyl acrylamide) Copolymers", React Funct Polym, 2010, 70, 230-237.   DOI   ScienceOn
7 I. Pinnau, Z. He, and A. Morisato, "Synthesis and Gas Permeation Properties of Poly(dialkylacetylenes) Containing Isopropyl-terminated Side-chains", J Membrane Sci, 2004, 241, 363-369.   DOI   ScienceOn
8 Y. C. Chung, D. K. Nguyen, and B. C. Chun, "Lateral Flexible Linking of Polyurethane Copolymer and the Effect on Shape Recovery and Tensile Mechanical Properties", Polym Eng Sci, 2010, 50, 2457-2466.   DOI   ScienceOn
9 Z. S. Petrovic, I. Javni, and V. Divjakovic, "Structure and Physical Properties of Segmented Polyurethane Elastomers Containing Chemical Crosslinks in the Hard Segment", J Polym Sci Polym Phys, 1998, 36, 221-235.   DOI   ScienceOn
10 V. Sekkar, S. Gopalakrishnan, and K. Ambika Devi, "Studies on Allophanate Urethane Networks Based on Hydroxyl Terminated Polybutadiene: Effect of Isocyanate Type on the Network Characteristics", Eur Polym J, 2003, 39, 1281-1290.   DOI   ScienceOn
11 S. R. Jane, V. Sekkar, and V. N. Krishinamurthy, "Modeling of Polyurethane Networks Based on Hydroxy-Terminated Polybutadiene and Poly(12-hydroxy stearic acid-o-TMP) Ester Polyol: Correlation of Network Parameters with Mechanical Properties", J Appl Polym Sci, 1996, 62, 2317- 2327.   DOI   ScienceOn
12 K. Takemoto, R. M. Ottenbrite, and M. Kamashi, "Functional Monomers and Polymers", 2nd Ed., CRC Press, FL, 1997.
13 D. C. Webester, "Cyclic Carbonate Functional Polymers: Synthesis and Applications", Polymer News, 1998, 23, 187-192.
14 U. Meier-Westhues, "Polyurethanes Coatings Adhesives and Sealants", Vincentz Network, Hannover, 2008.
15 G. Oertel, "Polyurethane Handbook", 2nd Ed., Hanser Publishers, Munich, 1993.
16 T. Takahashi, N. Hayashi, and S. Hayashi, "Structure and Properties of Shape-Memory Polyurethane Block- Copolymers", J Appl Polym Sci, 1996, 60, 1061-1069.   DOI
17 B. S. Lee, B. C. Chun, Y. C. Chung, K. I. Sul, and J. W. Cho, "Structure and Thermomechanical Properties of Polyurethane Block Copolymers with Shape Memory Effect", Macromolecules, 2001, 34, 6431-6437.   DOI   ScienceOn
18 J. W. Cho, J. W. Kim, Y. C. Jung, and N. S. Goo, "Electroactive Shape-Memory Polyurethane Composites Incorporating Carbon Nanotubes", Macromol Rapid Comm, 2005, 26, 412-416.   DOI   ScienceOn
19 A. M. Schmidt, "Electromagnetic Activation of Shape Memory Polymer. Networks Containing Magnetic Nanoparticles", Macromol Rapid Comm, 2006, 27, 1168-1172.   DOI   ScienceOn
20 J. S. Leng, X. Lan, Y. J. Liu, S. Y. Du, W. M. Huang, N. Liu, S. J. Phee, and Q. Yuan, "Biomedical Applications of Thermally Activated Shape Memory Polymers", Appl Phys Lett, 2008, 92, 014104-014107.   DOI   ScienceOn
21 H. Zhang, X. Jiang, and R. Linde, "Synthesis and Characterisation of Hydroxyl End-Capped Telechelic Polymers with Poly(methyl methacrylate)-block-poly(n-butyl acrylate) Backbones via Atom Transfer Radical Polymerization", Polymer, 2004, 45, 1455-1466.   DOI   ScienceOn
22 K. Ibrahim, B. Lofgren, and J. Seppal, "Synthesis of Tertiary-butyl Acrylate Polymers and Preparation of Diblock Copolymers Using Atom Transfer Radical Polymerization", Eur Polym J, 2003, 39, 2005-2010.   DOI   ScienceOn