Acetal-protected acrylic copolymers for dismantlable adhesives with spontaneous and complete removability

Sato, Eriko; Yamanishi, Keisuke; Inui, Tadashi; Horibe, Hideo; Matsumoto, Akikazu

doi:10.1016/j.polymer.2015.01.057

Cited by 36 publications

(31 citation statements)

References 26 publications

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“…The T g values of the homopolymers of iBEA, HEA, and IBoA were reported to be −10, −15, and 94 °C, respectively, being much higher than that of the homopolymer of 2EHA (−85 °C) [19,25]. The T g value was determined to be −19 °C for the random copolymer R1, which consisted of 2EHA unit (53 mol%) as the low T g repeating unit and iBEA (32 mol%) and HEA (15 mol%) units as the moderate T g repeating units.…”

Section: Resultsmentioning

confidence: 96%

“…Reactive polymers with functional groups protected with vinyl ethers have been synthesized and used for various applications, as reported in the literatures [26][27][28][29][30][31]. We found that the polymers containing the iBEA units were readily deprotected under single-stimulus conditions, such as hydrolysis without an acidic catalyst or acidolysis at room temperature under photoirradiation in the presence of PAG [25]. The use of the iBEA repeating unit as the reactive groups was suited to the construction of a quick debonding system, but the iBEA-containing copolymers were too reactive against the external stimuli such as heating in water and photoirradiation in the presence of PAG and consequently they were not applied as the dual-locked adhesive polymers.…”

mentioning

confidence: 75%

“…Other reagents and solvents were used without further purification. iBEA was synthesized according to the method described in the literature [25]. All copolymers were synthesized by organotellurium mediated radical polymerization (TERP) using binary azo initiators [20,32].…”

Section: Methodsmentioning

confidence: 99%

“…In order to develop adhesives more sensitive to external stimuli, we investigated the dismantlable adhesion behavior of the acrylic copolymers consisting of 1-isobutoxyethyl acrylate (iBEA), 2-ethylhexyl acrylate (2EHA), and 2-hydroxyethyl acrylate (HEA) units [25]. Reactive polymers with functional groups protected with vinyl ethers have been synthesized and used for various applications, as reported in the literatures [26][27][28][29][30][31].…”

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confidence: 99%

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Control of adhesive strength of acrylate polymers containing 1-isobutoxyethyl and isobornyl esters in response to dual stimuli for dismantlable adhesion

et al. 2017

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Section: Resultsmentioning

confidence: 96%

mentioning

confidence: 75%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Control of adhesive strength of acrylate polymers containing 1-isobutoxyethyl and isobornyl esters in response to dual stimuli for dismantlable adhesion

et al. 2017

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“…Recently, PSAs which can be removed from substrates easily by external stimuli such as UV irradiation [2][3][4], heat [5][6][7], and electrical voltage [8,9] were proposed in manufacturing of electronics and automobile.…”

Section: Introductionmentioning

confidence: 99%

Development of Pressure-Sensitive Adhesives Degradable on Ultrasonic Irradiation

Tachi

Suyama

2017

J. Photopol. Sci. Technol.

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We have developed novel pressure-sensitive adhesives (PSAs) which could be peeled off easily on ultrasonic irradiation as external stimuli. The PSAs were composed of aciddegradable polyurethanes and microcapsules containing a thermal acid generator (TAG). Three layered (w/o/w) type microcapsules containing a TAG were prepared by coacervation method. Generation of acid from the microcapsules and PSA layers on ultrasonic irradiation in water was confirmed by pH changes. Peel strength of PSAs containing the microcapsules decreased from 10 to 1 N/20mm on ultrasonic irradiation in water at 28 kHz for 20 min. The peel strength of PSAs containing the microcapsules was constant on heating up to 80 °C for 1 h, while that decreased on heating above 80 °C. These results suggest that acid was generated but kept in microcapsules on heating up to 80 °C, and the acid was released from microcapsules when PSAs were ultrasonic irradiated or heated above 80 °C.

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Dismantlable Adhesion Interface Featuring a Thermo/Photocleavable Molecular Layer

2021

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Adhesion technology, in which materials are bonded together to create an integrated material, is widely used in a range of household, commercial, and industrial applications. [1] In recent years, adhesives have received more attention from the viewpoint of energy consumption. In the automobile industry, reducing vehicle mass is a key factor regarding the demand for improving energy efficiency. Therefore, adhesives are becoming more important and more in demand owing to their availability to bond different materials that cannot be bonded through typical mechanical methods. [2] Among these demands for new adhesion technologies, sustainability through material lifecycle has also been recognized as an important factor. [3] Dismantlable adhesives that have been developed to meet these requirements exhibit sufficient adhesion strength during use and can be easily separated by external stimuli when the material in question needs to be recycled or repaired. [4][5][6] Various types of dismantlable adhesives have been developed that reduce the adhesive force by utilizing stimuli such as heating, [7][8][9][10][11][12] light irradiation, [13][14][15][16][17][18][19][20][21] electric fields, [22] magnetic fields, [23] and chemical treatments. [24][25][26] These dismantlable adhesives maintain the changed state caused by applying the stimulus; thus, there is no regain in their original adhesive strength even in the absence of the stimulation. This feature enables easy separation without the need for continuous stimulation. Despite the recent progress on these functional adhesives, neither is currently universally accepted in dismantling systems. [6] One considerable reason of this circumstance is that the dismantling mechanisms are limited to changes in bulk state, such as controlling the cohesiveness of the adhesives. This limitation requires large amounts of trigger materials, such as stimulusresponsive molecules, to dismantle these adhesives by changing their entire state. Therefore, the development to achieve both sufficient adhesion strength and an efficient dismantling system is difficult because the overall condition of adhesives needs to be involved.The surface treatment of adherends also plays a critical role in ensuring sufficient adhesion strength; altering the surface treatment is more efficient than changes in bulk state. [27] A typical example of surface treatment is a coating process applied to the base materials, which is known as a primer treatment. This has been conventionally used as a method to improve adhesion strength. [28] For example, phosphoric acid primers are used to improve adhesion between resin cements and zirconia ceramics, for which it is normally difficult to achieve suitable adhesion. [29,30] Organosilane compounds are used as coating agents to improve the adhesion strength between metal and

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Acetal-protected acrylic copolymers for dismantlable adhesives with spontaneous and complete removability

Cited by 36 publications

References 26 publications

Control of adhesive strength of acrylate polymers containing 1-isobutoxyethyl and isobornyl esters in response to dual stimuli for dismantlable adhesion

Control of adhesive strength of acrylate polymers containing 1-isobutoxyethyl and isobornyl esters in response to dual stimuli for dismantlable adhesion

Development of Pressure-Sensitive Adhesives Degradable on Ultrasonic Irradiation

Dismantlable Adhesion Interface Featuring a Thermo/Photocleavable Molecular Layer

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