scholarly journals Enhanced Heat Resistance of Acrylic Pressure-Sensitive Adhesive by Incorporating Silicone Blocks Using Silicone-Based Macro-Azo-Initiator

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2410
Author(s):  
Hee-Woong Park ◽  
Hyun-Su Seo ◽  
Kiok Kwon ◽  
Jung-Hyun Lee ◽  
Seunghan Shin
Keyword(s):  
Heat Resistance ◽  
Microphase Separation ◽  
Steel Substrate ◽  
Sharp Decrease ◽  
Peel Strength ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive ◽  
Adhesion Failure ◽  
Azo Initiator ◽  
Failure Temperature

To improve the heat resistance of acrylic-based pressure-sensitive adhesive (PSA), silicone-block-containing acrylic PSAs (SPSAs) were synthesized using a polydimethylsiloxane (PDMS)-based macro-azo-initiator (MAI). To evaluate the heat resistance of the PSA films, the probe tack and 90° peel strength were measured at different temperatures. The acrylic PSA showed that its tack curves changed from balanced debonding at 25 °C to cohesive debonding at 50 °C and exhibited a sharp decrease. However, in the case of SPSA containing 20 wt% MAI (MAI20), the balanced debonding was maintained at 75 °C, and its tack value hardly changed with temperature. As the MAI content increased, the peel strength at 25 °C decreased due to the microphase separation between PDMS- and acryl-blocks in SPSA, but the shear adhesion failure temperature (SAFT) increased almost linearly from 41.3 to 122.8 °C. Unlike stainless steel substrate, SPSA showed improved peel strength on a polypropylene substrate due to its low surface energy caused by PDMS block. Owing to the addition of 20 wt% silicone-urethane dimethacrylate oligomer and 200 mJ/cm2 UV irradiation dose, MAI20 showed significantly increased 90° peel strength at 25 °C (548.3 vs. 322.4 gf/25 mm for pristine MAI20). Its heat resistance under shear stress assessed by shear adhesion failure test (SAFT) exhibited raising in failure temperature to 177.3 °C when compared to non-irradiated sample.

Formulation and Evaluation of Quetiapine Loaded Pressure Sensitive Adhesive Patch for Transdermal Drug Delivery

2021 ◽  
pp. 2535-2539
Author(s):  
Milan B. Agrawal ◽  
Mayur M. Patel
Keyword(s):  
Ex Vivo ◽  
Research Work ◽  
Physicochemical Characterization ◽  
Oral Formulation ◽  
Peel Strength ◽  
Pressure Sensitive Adhesive ◽  
Promising Alternative ◽  
Permeability Enhancement ◽  
Pressure Sensitive ◽  
Adhesive Patch

The present research work was intended to develop and characterize the transdermal adhesive patch of quetiapine using different types of acrylate, polyisobutylene and silicon adhesives. Various permeation enhancers such as 1, 8 – cineole, D-limonene, Azone, IPM and Oleic acid were also evaluated to achieve desired permeation rate and hence to attain the improved bioavailability of quetiapine as compared to oral formulation. Formulations prepared were evaluated for physicochemical characterization, permeability enhancement potential by ex vivo, and stability studies. The results of the optimized formulation showed peel strength of 423 ± 4.13 cN/cm, flux of 54.92 ± 0.79 (µg/h/cm2) and % drug content of 98.16 ± 0.43% which was stable up to six months in accelerated condition. The results of the study revealed that the developed transdermal patch of quetiapine can be a promising alternative which provides effective management of schizophrenia in terms of improved patient compliance and reduced dosage frequency.

scholarly journals Adhesion Performance and Recovery of Acrylic PSA with Acrylic Elastomer (AE) Blends via Thermal Crosslinking for Application in Flexible Displays

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1959 ◽  
Author(s):  
Jung-Hun Lee ◽  
Gyu-Seong Shim ◽  
Hyun-Joong Kim ◽  
Youngdo Kim
Keyword(s):  
Crosslinking Agent ◽  
Peel Strength ◽  
Mechanical Analysis ◽  
Pressure Sensitive Adhesive ◽  
Flexible Display ◽  
Flexible Displays ◽  
Adhesion Properties ◽  
Pressure Sensitive ◽  
Thermal Crosslinking ◽  
Adhesion Performance

Acrylic pressure-sensitive adhesive (PSA) is used to fix each layer of a flexible display. Acrylic PSA needs to satisfy specific elongation and recovery requirements so that reliability of the flexible display can be achieved. For this reason, we aimed to design an acrylic PSA/acrylic elastomer (AE) blend and to study how some viscoelastic and adhesion properties are influenced by the AE content into the mixed, blended system. Samples were characterized by UV–Vis spectrophotometry for transmittance, texture analysis for adhesion performances, and dynamic mechanical analysis (DMA) for recovery and viscoelasticity. When acrylic PSA/AE was simply blended, the adhesion performance changed due to the influence of the long molecular chains of AE. Based on this result, the AE content was fixed at 10 wt %, and acrylic PSA prepolymer was crosslinked at different concentrations of crosslinking agent. Peel strength and probe tack decreased as the concentration of crosslinking agent increased, as reported in previous studies. On the other hand, as the content of the crosslinking agent increased, recovery characteristics were improved. Additionally, as the content of the crosslinking agent increased, the storage modulus also increased, although the glass-transition temperature was not affected. According to these findings, we successfully proved the possibility of using AE to adjust adhesion performance and recovery of acrylic PSA for designing flexible displays.

Synthesis and characterization of a pressure-sensitive adhesive based on an isobutyl acrylate / 2-ethylhexyl acrylate copolymer

e-Polymers ◽  
2004 ◽  
Vol 4 (1) ◽  
Author(s):  
Betty L. López ◽  
Edwin Murillo ◽  
Michael Hess
Keyword(s):  
Peel Strength ◽  
Copolymer Composition ◽  
Pressure Sensitive Adhesive ◽  
Adhesive Properties ◽  
Acrylate Copolymer ◽  
Low Viscosity ◽  
Pressure Sensitive ◽  
Good Adhesive ◽  
The Given

Abstract A removable pressure-sensitive adhesive was obtained by free-radical emulsion polymerization. The product is a low-viscosity copolymer from different polar and apolar acrylic monomers consisting of microspheres of about 1 μm diameter. 2-Ethylhexyl acrylate and isobutyl acrylate were used as non-polar constituents while acrylic acid and acrylamide provided the more polar constituents to regulate the cohesive force of the adhesive. The amounts of initiator, water and emulsifier (nonylphenol) were varied to obtain the best adhesive properties at the given copolymer composition. The resulting adhesive showed the desired balance of low tack and good adhesive strength in combination with a wide variety of substrates, which made it useful as a removable adhesive for many applications. The product was characterised by viscometry, measurements of tack and peel strength, FTIR, DSC, and microscopy.

“Cool-off” Function and Heat Resistance of an Acrylic Pressure Sensitive Adhesive Bearing a Mesogenic Group

2018 ◽  
Vol 47 (3) ◽  
pp. 344-346
Author(s):  
Satoshi Yamaguchi ◽  
Ryu Nakanishi ◽  
Minoru Nanchi ◽  
Shin’ichiro Kawahara ◽  
Hiroto Murakami
Keyword(s):  
Heat Resistance ◽  
Mesogenic Group ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive

The Study of High Heat Resistance of Nano-Modified Silicone Pressure Sensitive Adhesives

2011 ◽  
Vol 403-408 ◽  
pp. 1106-1112 ◽  
Author(s):  
Ming Yan Zhang ◽  
Guan Hui Wang ◽  
Peng Yu ◽  
Yi Wang
Keyword(s):  
Heat Resistance ◽  
High Heat ◽  
Peel Strength ◽  
Decomposition Temperature ◽  
High Heat Resistance ◽  
Temperature Index ◽  
Pressure Sensitive Adhesives ◽  
Nano Powder ◽  
Pressure Sensitive ◽  
Silane Coupling

In this article, silicone pressure sensitive adhesives (PSAs) were modified with the Nano-SiO2 and nano-Al2O3. In order to prevent agglomerate, nano powder was dealt with silane coupling agent and then mixed into PSAs, both of the processes were under the action of ultrasonic. The results of test showed that all kinds of temperature index of modified PSAs were increased obviously, which means the high heat resistance of PSAs increased evidently. At the same time, its peel strength also increased, but the tack decreased. The effects of different nano powder are different, and the decomposition temperature of the nanocomposite raised 8.32% when the content of nano-SiO2 is 4.5wt%, while raised 14.02% when that of nano-Al2O3 is 1.5wt%, and the best compositive performances were obtained at this content of Nano-Al2O3.

Synthesis and Characterization of Silicone Based Pressure Sensitive Adhesive

2011 ◽  
Vol 306-307 ◽  
pp. 1773-1778 ◽  
Author(s):  
Min He ◽  
Qiu Yu Zhang ◽  
Ji Ying Guo
Keyword(s):  
Silicone Rubber ◽  
Gel Permeation Chromatography ◽  
Peel Strength ◽  
Polymerization Reaction ◽  
Hydroxyl Group ◽  
Silicone Resin ◽  
Methyl Silicone ◽  
Condensation Polymerization ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive

The MQ silicone resin was synthesized by using chlorotrimethylsilane and tetraethyl orthosilicate and its structure was analyzed by means of Fourier transform infrared spectroscopy, 29Si-nuclear magnetic resonance and gel permeation chromatography. The silicone based pressure sensitive adhesive was obtained by condensation polymerization between the MQ resin and methyl silicone rubber terminated with hydroxyl group. The structure of the adhesive was characterized by FTIR, and its thermal properties were investigated via thermogravimetic analysis. The results show that the MQ resin successfully had a condensation polymerization reaction with the silicone rubber. The pressure sensitive adhesive had excellent tack, peel strength and high temperature resistance properties.

Hot-melt pressure-sensitive adhesive for seamless bonding of nylon fabric Part II: Process parameter optimization for seamless bonding of nylon fabric

2018 ◽  
Vol 89 (12) ◽  
pp. 2294-2304 ◽  
Author(s):  
Chung-Feng Jeffrey Kuo ◽  
Wei Lun Lan ◽  
Jui-Wen Wang ◽  
John-Ber Chen ◽  
Pin-Hua Lin
Keyword(s):  
Shear Strength ◽  
Phosphine Oxide ◽  
Color Difference ◽  
Peel Strength ◽  
Functional Monomer ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive ◽  
Nylon Fabric ◽  
Hot Melt

This study develops hot melt pressure sensitive adhesives (HMPSAs) for the seamless bonding of nylon fabric, using butyl acrylate as the main monomer material and mixing the functional monomer for polymerization. It is combined with 2-10phr diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide for the photoinitiator and ultraviolet irradiation is used to make a pre-polymer. The effects of butyl acrylate content, type of functional monomer, and 2-10phr diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide content on the molecular weight of acrylate pre-polymer are discussed, following the Taguchi method. The pre-polymer is then mixed with the reactive diluent glycidyl methacrylate blend and with 2-10phr diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, coated on a release film, irradiated by ultraviolet light, and cured into hot melt pressure sensitive adhesives. The adhesive properties of hot melt pressure sensitive adhesive bonding on nylon include the peel strength, the shear strength, adhesive warpage, adhesive color difference, and adhesive overflow, which are discussed following the Taguchi method and the elimination and choice translating reality method for multi-quality analysis. Hot melt pressure sensitive adhesives are implemented by optimization parameters for practical validation. The results show that the peel strength of hot melt pressure sensitive adhesives is 1.495 kg/cm, the shear strength of hot melt pressure sensitive adhesives is 14.326 kg/cm2, adhesive warpage is 0.93 mm, adhesive color difference is 1.66, and adhesive overflow is 0.97 mm. The performance of HMPSAs in this study is enhanced effective.

Study on Preparation and Properties of Pressure Sensitive Adhesive of Acrylate Prepared by Miniemulsion

2011 ◽  
Vol 183-185 ◽  
pp. 1938-1941
Author(s):  
Jiu Yin Pang ◽  
Chuan Sun ◽  
Shi Cheng Zhang ◽  
Zhen Xing
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Vinyl Acetate ◽  
Butyl Acrylate ◽  
Peel Strength ◽  
Excellent Performance ◽  
Pressure Sensitive Adhesive ◽  
Pressure Sensitive

Miniemulsion was prepared by means of different ratio of butyl acrylate with vinyl acetate emulsion pressure sensitive adhesive excellent performance. Focused on acrylic acid and vinyl acetate copolymers of different proportions of the glass transition temperature, molecular weight and molecular weight distribution of micro-factors, and build the macroscopic properties of the copolymer glass transition temperature and molecular weight between contacts. The use of APS as initiator under the conditions of the experiment found that with the increase of acrylic, PVC-floor, 180 peel strength composite materials decreased. While the molecular weight of butyl acrylate with the increase of the amount did not change significantly, the initial viscosity of the polymer and 180 º peel strength is improved, but the adhesive holding down quickly.

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