In the present study, response surface methodology is used to synthesize hyperbranched polyesters based on variables reaction time, ratio of monomer to core, and type of catalyst. Then, the synthesized polyesters were used for preparing hyperbranched urethane acrylates in two steps. In order to characterize these polymers, infrared spectroscopy and proton nuclear magnetic resonance is used. Hyperbranched urethane acrylates were formulated and cured by ultraviolet irradiation. Finally, dynamic mechanical thermal analysis (DMTA) test is used to investigate the viscoelastic properties of the coatings. The results of DMTA test were shown that the higher molar mass distribution of hyperbranched polyester is associated with less uniformity of cross-link network of cured samples. Also by increasing the molar mass of hyperbranched polyester, glass transition temperature of cured urethane acrylate resins was increased. The samples produced by using methane sulfonic acid catalyst show higher strength and more uniform cross-link network than the those made by sulfuric acid catalyst.
YanCGDFreyH. Hyperbranched polymers: synthesis, properties and applications. New York: John Wiley & Sons, 2009.
2.
CaminadeAMYancDSmithDK. Dendrimers and hyperbranched polymers. Chem Soc Rev2015; 44: 3870–3873.
3.
FréchetJMJHawkerCJGitsovI. Dendrimers and hyperbranched polymers: two families of three dimensional macromolecules with similar but clearly distinct properties. JMS Pure Appl Chem1996; 33: 1399–1425.
4.
VoitB. New developments in hyperbranched polymers. J Polym Sci Part A: Polym Chem2000; 38: 2505–2525.
5.
GurunathanTMohantySNayakSK. Hyperbranched polymers for coating applications: a review. Polym Plast Techn Eng2016; 55: 92–117.
6.
KakimotoMGrunzingerSJHayakawaT. Hyperbranched poly(ether sulfone)s: preparation and application to ion-exchange membranes. Polymer J2010; 42: 697–705.
7.
SangermanoMPriolaAMalucelliG. Phenolic hyperbranched polymers as additives in cationic photopolymerization of epoxy systems. Macromol Mater Eng2004; 289: 442–446.
8.
SangermanoMGianniADBongiovanniR. Synthesis of fluorinated hyperbranched polymers and their use as additives in cationic photopolymerization. Macromol Mater Eng2005; 290: 721–725.
9.
PetterssonB. Hyperbranched polymers: unique design tools for multi-property control in resins and coatings. Pigment Resin Techn1996; 25: 4–14.
10.
SudoYSakaiHNabaeY. Preparation of hyperbranched polystyrene-g-poly(N-isopropylacrylamide) copolymers and its application to novel thermos-responsible cell culture dishes. Polymer2015; 70: 307–314.
11.
ZagarEZigonM. Aliphatic hyperbranched polyesters based on 2,2-bis(methylol)propionic acid: determination of structure, solution and bulk properties. Prog Polym Sci2011; 36: 53–88.
12.
CarlmarkAMalmströmEMalkochM. Dendritic architectures based on bis-MPA: functional polymeric scaffolds for application-driven research. Chem Soc Rev2013; 42: 5858–5879.
13.
PahovnikDČusakARevenS. Synthesis of poly(ester-amide) dendrimers based on 2,2-bis(hydroxymethyl) propanoic acid and glycine. J Polym Sci, Part A: Polym Chem2014; 52: 3292–3301.
FarzadHNajafiFBengisuM. Synthesis and characterization of aliphatic tri-functional oligomeric urethane methacrylate used for UV-curable aluminum pigmented coatings. J Macromol Sci Part A2013; 50: 504–512.
16.
NajafiFShirkavand HadavandBManouchehriF. Synthesis and characterization of anionic polyurethane dispersants for waterborne paints. Prog Color Colorants Coat2014; 7: 147–154.
17.
BaoFShiW. Synthesis and properties of hyperbranched polyurethane acrylate used for UV curing coatings. Prog Org Coat2010; 68: 334–339.
18.
HanWLinBZhouY. Synthesis and properties of UV-curable hyperbranched polyurethane acrylate oligomers containing photoinitiator. Polym Bull2012; 68: 729–743.
19.
CuiJZhangYHuX. Synthesis of UV-cured hyperbranched polyurethane acrylate coatings and its corrosion resistance revealed by electrochemistry. Int J Electrochem Sci2016; 11: 3727–3737.
20.
ChattopadhyayDKRajuKVSN. Structural engineering of polyurethane coatings for high performance applications. Prog Polym Sci2007; 32: 352–418.
21.
RenLFLiZWangXC. Characterization of polyester type hyperbranched polyurethane. Adv Mater Res2012; 554: 187–190.
Shirkavand HadavandBSaebMRNajafiF. Response surface analysis for understanding the effects of synthesis parameters on the microstructure of hyperbranched polyesters. J Macromol Sci Part A2016; 53: 741–749.
24.
SardonHEnglerACChanJM. Organic acid-catalyzed polyurethane formation via a dual-activated mechanism: unexpected preference of N-activation over O-activation of isocyanates. J Am Chem Soc2013; 135: 16235–16241.
VukovićJ. Synthesis and characterization of aliphatic hyperbranched polyesters. PhD Thesis, Institut für Chemie, Universität Osnabrück, Germany, 2006.
27.
FreyH.Degree of branching in hyperbranched polymers 2. Enhancement of the DB: scope and limitations. Acta Polym1997; 48: 298–309.
28.
HawkerCJLeeRFrechetJMJ. One-step synthesis of hyperbranched dendritic polyesters. J Am Chem Soci1991; 113: 4583–4588.
29.
HölterDBurgathAFreyH. Degree of branching in hyperbranched polymers. Acta Polym1997; 48: 30–35.
30.
FarzadHNajafiFBengisuM. Synthesis and characterization of aliphatic tri-functional oligomeric urethane methacrylate used for UV-curable aluminum pigmented coatings. J Macromol Sci Part A2016; 50: 504–512.
31.
SardonHTanJPKChanJMW. Thermoresponsive random poly(ether urethanes) with tailorable LCSTs for anticancer drug delivery. Macromol Rapid Commun2015; 36: 1761–1767.
32.
TasicSBozicBDunjicB. Synthesis of new hyperbranched urethane-acrylates and their evaluation in UV-curable coatings. Prog Org Coat2004; 51: 320–327.
