UV curable pressure-sensitive adhesives for fabricating semiconductors. II. The effect of functionality of acrylate monomers on the adhesive properties

2004 ◽  
Vol 93 (6) ◽  
pp. 2889-2895 ◽  
Author(s):  
Katsuhiko Horigome ◽  
Kazuyoshi Ebe ◽  
Shin-ichi Kuroda
Keyword(s):  
Adhesive Properties ◽  
Uv Curable ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Acrylate Monomers

Preparation of High-Solids UV-Curable Actylate Pressure-Sensitive Adhesive with Low Viscosity for Printed Electronics

2014 ◽  
Vol 644-650 ◽  
pp. 4936-4940
Author(s):  
Yan Yan Cui ◽  
Guang Xue Chen
Keyword(s):  
Printed Electronics ◽  
High Solids ◽  
Pressure Sensitive Adhesive ◽  
Uv Curable ◽  
Ink Jet Printing ◽  
Pressure Sensitive Adhesives ◽  
Low Viscosity ◽  
Pressure Sensitive ◽  
Ink Jet ◽  
Jet Printing

If the pressure sensitive adhesive is coated on the back, it can be used for bonding electronic tag, overburden, protective layer, and RFID layer. The acrylate pressure sensitive adhesives are simple and less pollution, so more and more companies pay attention on this kind of binder. Since the thickness of adhesive layer is relatively small, ink-jet printing is now widely used to easily obtain thin layer and design the pressure sensitive adhesive shape of different parts. So how to get superior performance pressure sensitive adhesive which is suitable for ink-jet printing become an urgent problem in printed electronics. The experiment was conducted through solution copolymerization of various vinyl monomers which were selected on the principle of solvent parameter prepared by free radical polymerization. The monomer, initiator mixture solution was dropped in continuous and synchronization process. By regulating the amount of initiator and polymerization temperature, we could effectively reduce the system viscosity and prepare high quality high-solids acrylate UV-curable pressure sensitive adhesives with low viscosity for ink-jet printing. The influence of initiator, solvents, transfer reagents and temperature on the structure and properties of the resin were discussed.

scholarly journals Robust, universal, and persistent bud secretion adhesion in horse-chestnut trees

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Dagmar Voigt ◽  
Jaekang Kim ◽  
Anne Jantschke ◽  
Michael Varenberg
Keyword(s):  
Fatty Acids ◽  
Chemical Properties ◽  
Horse Chestnut ◽  
Adhesive Properties ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Nuclear Magnetic Resonance Spectra ◽  
Component Material ◽  
Dry Out

Abstract Buds of horse-chestnut trees are covered with a viscous fluid, which remains sticky after long-term exposure to heat, frost, radiation, precipitation, deposition of aerosols and particles, attacks by microbes and arthropods. The present study demonstrates that the secretion does not dry out under arid conditions, not melt at 50 °C, and not change significantly under UV radiation or frost at a microscopic level. It is slightly swellable under wet conditions; and, it universally wets and adheres to substrates having different polarities. Measured pull-off forces do not differ between hydrophilic and lipophilic surfaces, ranging between 58 and 186 mN, and resulting in an adhesive strength up to 204 kPa. The mechanical and chemical properties of secretion resemble those of pressure-sensitive adhesives. The Raman, infrared, and nuclear magnetic resonance spectra show the clear presence of saturated aliphatic hydrocarbons, esters, free carboxylic acids, as well as minor amounts of amides and aromatic compounds. We suggest a multi-component material (aliphatic hydrocarbon resin), including alkanes, fatty acids, amides, and tackifying terpenoids embedded in a fluid matrix (fatty acids) comprising nonpolar and polar portions serving the universal and robust adhesive properties. These characteristics matter for ecological-evolutionary aspects and can inspire innovative designs of multifunctional, biomimetic pressure-sensitive adhesives and varnishes.

Adhesion of Triblock Copolymer-Based Thermoreversible Gels and Pressure Sensitive Adhesives

2000 ◽  
Vol 629 ◽  
Author(s):  
Kenneth R. Shull ◽  
Alfred J. Crosby ◽  
Cynthia M. Flanigan
Keyword(s):  
Elastic Moduli ◽  
Adhesive Layer ◽  
Work Of Adhesion ◽  
Underlying Structure ◽  
Pressure Sensitive Adhesive ◽  
Adhesive Properties ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Surface Development ◽  
Thermoreversible Gels

ABSTRACTTriblock copolymers with poly (methyl methacrylate) (PMMA) end blocks and a poly (n-butyl acrylate) (PnBA) midblock have been synthesized as model pressure sensitive adhesives and thermoreversible gels. These materials dissolve in a variety of alcohols at temperatures above 60 °C to form freely flowing liquids. At lower temperatures the PMMA end-blocks associate so that the solutions form ideally elastic solids. In our case the solvent is 2-ethylhexanol, polymer volume fractions vary from 0.05 to 0.3, and the elastic moduli are close to 10,000 Pa. We have conducted three types of experiments to elucidate the origins of adhesion and bulk mechanical properties of these materials: 1) Weakly adhering gels: The adhesive properties of the gels are dominated by the solvent. Very little adhesion hysteresis is observed in this case, although we do observe hysteresis associated with the frictional response of the layers. 2) Strongly adhering gels. By heating the gels in contact with a PMMA surface, it is possible to bond the gels to the surface. Development of adhesion as the PMMA blocks penetrate into the PMMA substrate can be probed in this case. The cohesive strengths of the gels are found to be substantially greater than their elastic moduli, so that these materials can be reversibly extended to very high strains. These properties have enabled us to probe the origins of elastic shape instabilities that play a very important role in the behavior of thin adhesive layers. 3) Dried gels – model pressure sensitive adhesives. By removing the solvent at low temperatures, the underlying structure of the gel is preserved, giving a thin elastic layer with excellent performance as a pressure sensitive adhesive. Resistance to adhesive failure, expressed as a velocity-dependent fracture energy, greatly exceeds the thermodynamic work of adhesion. This energy is further magnified by ‘bulk’ energy dissipation when the stress applied to the adhesive layer exceeds its yield stress.

Control of adhesive properties through structured particle design of water-borne pressure-sensitive adhesives

Polymer ◽  
2009 ◽  
Vol 50 (7) ◽  
pp. 1654-1670 ◽  
Author(s):  
Andrew B. Foster ◽  
Peter A. Lovell ◽  
Michael A. Rabjohns
Keyword(s):  
Adhesive Properties ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Water Borne

scholarly journals Influence of Acrylic Acid and Tert-Dodecyl Mercaptan in the Adhesive Performance of Water-Based Acrylic Pressure-Sensitive Adhesives

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2879
Author(s):  
Irene Márquez ◽  
Núria Paredes ◽  
Felipe Alarcia ◽  
José Ignacio Velasco
Keyword(s):  
Acrylic Acid ◽  
Chain Transfer ◽  
Shear Resistance ◽  
Chain Transfer Agent ◽  
Adhesive Properties ◽  
Gel Content ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Water Based ◽  
Dodecyl Mercaptan

Currently, pressure-sensitive adhesives (PSA) are used in more than 80% of all labels in the market today. They do not require any heat, solvent, or water to activate: It only takes light pressure to apply them to a product surface. Many products that come in glass bottles need labels that have staying power in harsh conditions. For that reason, it is necessary to have a good balance between all the polymer adhesive properties. In this study is described how adhesive properties of water-based PSA were affected by varying the amount of functional monomer acrylic acid (AA) and chain transfer agent, tert-dodecyl mercaptan (TDM). Four series of PSA were prepared by emulsion polymerization. Within each polymer series, the AA monomer proportion was held constant between 0.5 and 3.0 phm, and the fraction of the chain transfer agent was varied 0.0 to 0.2 phm. The results showed that the gel content decreased with the increase of the chain transfer agent and with the reduction of AA. All adhesives properties (tack, peel, and shear resistance) improved with increasement of the AA monomer. The increase of chain transfer agent caused decrease of the gel content resulting in higher peel resistance and tack values, but lower shear resistance values.

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