ASTM D MEK Test (Zinc Test) – Free download as PDF File .pdf), Text File . txt) or read online for free. Designation: D – Standard Test Method for. Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub1 This standard. Buy ASTM D Standard Test Method for Measuring MEK Resistance of Ethyl Silicate (Inorganic) Zinc-Rich Primers by Solvent Rub from SAI Global.
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This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution CC BY license http: Moreover, the water resistances of the cured Astm d4752 ink films were excellent in which no blistering, no swelling, and excellent adhesion were observed after being immersed in water for 24 h.
Considering the effects of the alkyl chain length on an increase in T gthe cured ink prepared from OL-A with the longer chain length shows a higher increase in T g. After functionalization, the signals of the characteristic peaks of protons of the acrylate double bond are detected at 6. Coatings7 10astm d4752 doi: Astm d4752 vacuum distillation of the functionalized product to remove the azeotropic solvent and unreacted acrylic acid, it was found that some residual acrylic acid still remained in the product, astm d4752 confirmed by acid value determination.
This could be attributed to the long aliphatic chain astm d4752 of OL-As. Choose your preferred view mode Please select whether you prefer to view the MDPI pages with a view tailored for mobile displays or to view the MDPI pages in the normal scrollable desktop version.
As a result, chain mobility of OL-As increases due to the depletion astm d4752 intermolecular hydrogen bonding astm d4752. The peak at 2. Starting oligolactides can be synthesized by ring opening polymerization of lactide monomers or by depolymerization of polylactide such as glycolysis [ 10 ]. The astm d4752 formulated from oligomers with lower molecular weight exhibited better ink flow property.
The printed samples of the black inks are shown in Figure Referring to previous papers, polylactides containing vinyl end groups were astmm and their thermal or UV curing behaviors were investigated [ 67 ].
The stoichiometric amount astm d4752 calculated from the theoretical molecular weight of each OL-OH.
To obtain low viscosity ink formulation, astm d4752 monomers are usually employed [ 8 ]. All results astm d4752 that all the synthesized oligolactide acrylates can be used as starting materials for UV-curable screen printing inks.
Firstly, low molecular weight oligolactide diols were prepared by ring opening reaction of l astm d4752 with diols. Screen printing inks were then formulated from the obtained oligolactide acrylates and the properties of ink films achieved by UV-curing were tested and compared with that prepared from a commercial polyester diacrylate oligomer EB Astm d4752 8 represents the rheological behavior of astm d4752 OL-As.
One email for each search. Glass transition temperature T g of the oligomers were determined from a second heating scan. You can also change the view style at any point from the main header when using the pages with your mobile device. It can be observed that all OL-As exhibit shear thinning behavior for which the viscosity decreases astm d4752 the shear rate increases.
This is probably due to the difference zstm the type and structure of the starting oligomers. Find Similar Items This product falls into the following categories.
Practice D is the preferred method for organic coatings. Unfortunately, due to astm d4752 high molecular weights, polylactide acrylates are too viscous to be diluted by reactive c4752 and to be applied by the screen printing process. The proposed reaction scheme of the lactide oligomer synthesis together with the chemical structures of BD, HD, and DD, are given in Figure 1.
Oligolactide astm d4752 were firstly synthesized by ring opening reaction of l -lactide with 1,4-butanediol, 1,6-hexanediol, and 1,decanediol.
The acrylic acid astm d4752 in the oligomers can be removed by washing with dilute caustic soda.
Ring opening reaction astm d4752 of l -lactide with diol ring openers. It has been shown that the degree of cure of ethyl silicate zinc-rich primers can be measured by the chemical changes astm d4752 using diffuse reflectance infrared spectroscopy. No crystallization temperature and melting temperature are observed, d44752 that the oligomers are amorphous after heat treatment.
astm d4752 Results show that this approach can be used to produce low viscosity, bio-based oligolactide v4752 for UV-curable screen printing inks. Molecular weights of synthesized oligolactide diols.
ASTM D4752 – 10(2015)
The flexibility measured by bending test, as axtm as the impact astm d4752 of all the films were also excellent. This is probably because the hydrogen bonds between the oligomer chains astm d4752 broken when the shear force is being applied, allowing the molecules to move more easily past one another.
A mixture of Oxy-phenyl-acetic astm d4752 2-[2-oxophenyl-acetoxy-ethoxy]-ethyl ester and Oxy-phenyl-acetic acid 2-[2-hydroxy-ethoxy]-ethyl ester Irgacure was purchased from Merit Solution C4752. Search all products by. The curing of the inks was evaluated by the solvent resistance rub test.
Acid values of the OL-As after neutralization were also determined. You may experience issues atsm this site in Astm d4752 Explorer 9, 10 or Neutralization reaction aatm of acrylic acid with diglycidyl ether bisphenol A [ 29 ].
This environmentally friendly polymer has been widely used in medical and pharmaceutical applications because of its biocompatibility and biodegradability [ 5 ]. The proposed neutralization reaction scheme is astm d4752 in Figure 7. The synthesis commenced astm d4752 adding predetermined amounts of l -lactide and a ring opener into a mL three-neck round-bottom flask equipped with a thermometer, a magnetic stirrer, a nitrogen gas inlet tube, a Astm d4752 separator Sigma Aldrich, St.