UV-curing Behaviors of Dendritic Polyacrylates

Aoki, Katsumi; Hiraoka, Akiko; Ichimura, Kunihiro

doi:10.2494/photopolymer.23.457

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Among the photosensitive materials, the UV-sensitive polymers have been highlighted because of their excellent properties and wide applications in many fields. The technological Z applications of these photoactive materials are in the fields of lithography [7][8][9][10], liquid crystals [11][12][13][14], nonlinear optical materials [15][16][17][18], optical anisotropy [19][20][21], and UV curing process [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Novel UV-sensitive bis-chalcone derivatives: synthesis and photocrosslinking properties in solution and solid PMMA film

et al. 2011

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A series of chalcone derivatives in which two chalcone groups are attached by alkyldioxy chains were synthesized and characterized by 1 H NMR, UV-Vis, and Fourier transform infrared (FTIR) spectral analysis. Upon the irradiation of 365-nm UV light, the chalcone groups in the molecules underwent [2p ? 2p] photodimerization. The photocrosslinking properties were investigated both in solution and in polymethyl methacrylate (PMMA) solid films on quartz plate. It has been found that the photocrosslinking rates of the compounds depended on the different flexibility of the functional groups, which was determined by the length of the spacer chain between the two chalcone moieties. The longest soft chain containing derivatives has a faster photocrosslinking rate both in solution and in solid film. Irradiated by polarized ultraviolet light (PUV), all of the films doped with bis-chalcone derivatives showed an anisotropic absorption property, which may give a promising application as LC-alignment materials.

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Section: Introductionmentioning

confidence: 99%

Novel UV-sensitive bis-chalcone derivatives: synthesis and photocrosslinking properties in solution and solid PMMA film

et al. 2011

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“…Hyperbranched polymers (HBP) have unique and exceptional novel features that made them differing from their linear analogs. The chains of HBP diverge unsymmetrically in three-dimensional space from a focal point; thus, they are shaped as a tree with tremendous branching (Aoki et al, 2010). These structures have been recognized as especially attractive materials for industrial purposes because of their high functionality, high solubility and unique environment-friendly behavior as a result of their potential use as alternatives to hazardous additives (Aswini et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Hyperbranched additive into a high solid acrylate coating for automotive application: impact on performance and emission of volatile organic content

Meglaa

Tawfik

Morsy

et al. 2021

PRT

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Purpose Automotive coating materials are very important items for this industry. However, their performance is limited by the use of excessive amounts of solvents in their formulations, whereas the emission of volatile organic solvents is against the widely ascending principle of green chemistry. Thus, this study aims to overcome this global problem to save the environment without affecting the properties and performance of the coating. Design/methodology/approach High solid content paint formulation for automotive applications has been designed with low amount of volatile organic solvents with the aid of a functionalized hyperbranched modifier. Findings It was found that the presence of a hyperbranched additive allows a high solid content to be designed and facilitate the processing, which indicates its liability to compensate the role played by excessive solvents amounts. In addition, the mechanical properties and physical characteristics of the modified coatings showed outstanding performance and preservation of clarity in comparison with the commercial counterparts. Practical implications A high solid content coating with facile processing and improved performance leads to cheaper price beside the positive impact on the environment considering the limited emission of volatile organic contents. Social implications Limitation of the used volatile organic compounds in any industry helps to save the health of humans and keep the environment unaffected. Originality/value The use of functionalized hyperbranched additive to automotive coatings is a very promising additive for automotive coatings with optimized characteristics.

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“…3,7 They therefore have been generally recognized as potentially economical and more feasible counterparts for dendritic polymers. 8 –10 Since they can be manufactured more quickly and easily in a one-step or quasi-one-step polymerization procedure, their significantly lower manufacturing cost puts them in a much more favorable position for industrial applications, especially as coating resins. However, from more elaborate building blocks, most of the hyper-branched polymers reported are synthesized with so-called “A + B 2 ” monomers.…”

Section: Introductionmentioning

confidence: 99%

Hyper-branched acrylic resin with high solid contents

Ding

Liu

Chen

et al. 2017

Journal of Thermoplastic Composite Materials

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A novel high solids acrylic resin (HSARs) with high solid content (78%) was synthesized from co-polymerization of the methyl methacrylate, butyl acrylate, acrylate acid, hydroxyl propyl acrylate, and hyper-branched macromonomer (HBM) in this study. The HBM was prepared by an “A2 + B3 + CA2” reaction system that covers four steps. The progress of each step of the reaction was monitored by real-time analysis for acid value and hydroxyl value of the reactants. Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance (NMR) was employed to characterize the structure of HBM. The viscosity, mechanical properties, solvent resistance, and volatile organic compounds (VOC) of the HSARs were also assessed. Compared with conventional commercial polyacrylate resin with a 42% solid content, solid content of HSARs was increased by 78% and VOC was decreased by 40% due to the addition of HBM. Moreover, the HSARs resin possesses good solvent resistance and lower viscosity, which provides the possibility of decreasing the organic solvent when using them to make operational coatings.

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UV-curing Behaviors of Dendritic Polyacrylates

Cited by 4 publications

References 8 publications

Novel UV-sensitive bis-chalcone derivatives: synthesis and photocrosslinking properties in solution and solid PMMA film

Novel UV-sensitive bis-chalcone derivatives: synthesis and photocrosslinking properties in solution and solid PMMA film

Hyperbranched additive into a high solid acrylate coating for automotive application: impact on performance and emission of volatile organic content

Hyper-branched acrylic resin with high solid contents

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