Effect of CaCO3 on the performance of Partex surface modification by ultraviolet radiation curing method
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Abstract Several UV‐curable formulations containing epoxydiacrylate (EB‐600) oligomer with a tri‐functional monomer, trimethylol propane triacrylate (TMPTA), and photoinitiator Irgcure‐369 were developed to improve the surface of Partex. Filler or extender CaCO 3 was incorporated into the solution. Thin polymer films were prepared on glass plate with these formulated solutions and finally applied on polished Partex surface, and both were cured under UV‐radiation. The properties of UV‐cured thin films were studied as a function of CaCO 3 concentration. Pendulum hardness and gel content were found to decrease on glass plate with the increase of CaCO 3 concentration. Pendulum hardness, scratch hardness, and abrasion resistance of the cured Partex were found to be higher with the increase of CaCO 3 content up to 4%. Thus, the formulation containing 4% CaCO 3 showed the best performance over all formulations containing CaCO 3 . © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 1858–1867, 2001Keywords:
TMPTA
UV-Curing
Ultraviolet
Gloss (optics)
Polyvinylpyrrolidone
Filler (materials)
Surface Modification
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Abstract An dendritic acrylate oligomer with eight double bonds (DAO) was synthesized by Michael addition reaction of ethylene diamine (EDA) and trimethylolpropane triacrylate (TMPTA) under mild conditions, and was easily separated from the reaction system with methanol. The structure of DAO was characterized by IR, 1 H‐NMR, and elemental analysis. DAO is UV curable oligomer with low viscosity and high curing speed. Its viscosity was 10.85% of that of the linear acrylic oligomers with similar molecule weight (EBECRYL Resin 285). With Darocure 1173 as the photoinitiator, the curing speed of DAO was respectively 7.5 and 10.3 times higher than that of EBECRYL Resin 605 and EBECRYL Resin 285. Furthermore, the effect of the photoinitiator and active diluent on curing speed of DAO UV curing system was studied. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1018–1022, 2004
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Oligomer
UV-Curing
Prepolymer
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The UV-curable turpentine polyurethane acrylate prepolymer( TPUA) was synthesized by TDI,self-made turpentine polyester polyols and hydroxypropyl acrylate. Then the UV curing coating was prepared by TPUA,photoinitiator and reactive diluent. The effects of photoinitiator and reactive diluent type,amount and ratio on the coating properties were investigated by the tests of gel fraction,hardness,adhesion and mechaincal property and TG analysis. The results indicated that the hardness,adhesion,tensile strength and elongation at break of the coatings was 4 H,0 level,13. 3 MPa,214. 2% ,respectively at the conditions as followed:complex photoinitiator of ITX and 1173,m( ITX) ∶ m( 1173) = 1∶ 0. 5,photoinitiator amount 6% ( based on the prepolymer) ; complex reactive diluents of two functional reactive diluent EB154 and three functional reactive diluent TMPTA ,m( EB154) ∶ m( TMPTA) = 3∶1,diluent amount 64% ( based on the prepolymer). The coatings also had good thermal stability.
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UV-Curing
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With the hexa-functional polyurethane acrylate prepolymer and ethoxylated trimethylolpropane triacrylate as the main materials,isobutyl methyl ketone,2-butanone and proprylene glycol monomethyl ether as the mixed solvent,1-hydroxycyclohexyl phenyl ketone as the photoinitiator,the nano-SiO~2 and conductive polymer as the additives,silicone polyether as the flatting agent,anti-static HC film with high hardnessand scratch resistance was prepared.And the influences of photoinitiator,UV curing conditions,nano-SiO~2 dispersion,flatting agent and conductive polymer were investigated on the appearance and performance of the HC film.The results showed that the HC film had good combined performance with pencil hardness of 3H5/5,scratch resistance of 116 times 200 g,sheet resistance is 10~(10)Ω,total transmittance of 90.4%and haze of 0.9% when the photoinitiator,nano-SiO~2 dispersion,flatting agent,conductive polymer and the UV curing conditions were 8 parts,30 parts,0.4 parts,10 parts and 200 mW/cm~2,300 mJ/cm~2,respectively.
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Antistatic agent
UV-Curing
Acrylate polymer
TMPTA
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TMPTA
Phosphine oxide
Bulk polymerization
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The aim of this work was to study the effect of the components of UV varnish on the glossiness, adhesion fastness and curing time of the copper printing paper after polishing, and to develop a UV varnish formula with good performance for copper printing paper. Appropriate prepolymer, monomer and photoinitiator were selected to prepare different UV varnish by changing the contents of the components. The changes of the performance were observed. The best formula was prepolymer epoxy acrylate(30%), PUA(15%); Monomer TMPTA(36%), TPGDA(4.5%), DPGDA(4.5%);Photoinitiator Irgacure 907(3.6%),Darocure184(0.9%), BYK-320(0.5%). The glossiness and adhesion fastness of the copper printing paper were improved and the film curing time was shortened when the prepolymer EA∶PUA was 2∶1,photoinitiator 907∶184 was 4∶1, and monomer TMPTA∶TPGDA∶DPGDA was 8∶1∶1.
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Abstract Novel polymeric photoinitiator based on Michler's ketone (MK) (PMKPR) was synthesized by introducing coinitiator amine and MK into the same polymeric chain as well as the low‐molecular weight model compounds. UV–vis spectra show that PMKPR has the characteristic UV–vis absorption of MK. The photobleaching behavior of PMKPR and the model compounds were studied, indicating that the photobleaching rate of PMKPR is much faster than that of model compounds. Two types of monomer with different functionality, 2,2‐ bis [4‐(acryloxypolyethoxy)phenyl] propane (A‐BPE‐10) and trimethylopropane triacrylate (TMPTA), were chosen to be initiated by these photoinitiators. The result indicates that PMKPR is an efficient photoinitiator for polymerization of A‐BPE‐10 and TMPTA. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
TMPTA
Photobleaching
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Summary UV radiation with a photoinitiator has been utilized to modify polypropylene (PP). Factors affecting solid state photomodification were studied and the optimal processing conditions for formation of three different structures (degraded, long chain branched and crosslinked) in PP were determined. A long radiation time (more than 5 minutes) is required to form long chain branched PP (LCBPP) and this exposure time is even higher for production of crosslinked PP (XPP). Trimethylolpropane triacrylate (TMPTA) was utilized to decrease UV radiation duration. Optimal concentrations of TMPTA and photoinitiator for formation of long chain branched and crosslinked PP were determined. Finally, a setup was suggested for continuous photomodification of PP using a twin screw extruder. In this design, PP strands are irradiated directly after the die. Optimal photoinitiator (benzophenone) concentration, coagent (TMPTA) concentration and radiation time required to form controlled rheology (CRPP) or long chain branched PP or crosslinked PP were identified.
TMPTA
Polypropylene
Reactive extrusion
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TMPTA
Prepolymer
Side chain
Acrylate polymer
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Gloss (optics)
UV-Curing
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A facile measuring apparatus for studying filter effect on UV curing reaction of acrylate monomers was prepared. Correlation of depth of curing of the monomer and conversion of C= C double bond was examined with this apparatus. The conversion of C=C of the monomer decreased from 75.0% to 19.5%with increasing depth of curing of 2-ethyl-2-hydroxymethy1-1, 3-propanediol triacrylate (TMPTA) under UV irradiation with 40 mJ/cm2 owing to filter effect of acrylate monomer and photoinitiator. The depth of curing of the monomer increased with an decrease in the concentration of photoinitiator in monomer. The depth of curing showed the largest value by use of TMPTA for monomer and 2-methyl1-[4- (methylthio)pheny1]-2-morpholino-1-propanone for photoinitiator.
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UV-Curing
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