Polyethylene wax as an alternative to mineral fillers for preparation of reinforced pressure-sensitive adhesives

Kostyuk, Anna V.; Ignatenko, V. Ya.; Makarova, V. V.; Антонов, С. В.

doi:10.1016/j.ijadhadh.2020.102689

Cited by 16 publications

(6 citation statements)

References 31 publications

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“…Therefore, asphaltenes at a mass fraction of 5–10% act as tackifiers for the polymer matrix, probably because they are partially soluble in the matrix and act similarly to oligomeric compounds used for the same purpose [ 25 , 26 , 27 , 28 , 45 , 101 ]. Since the polymer matrix initially has a good tackiness, its additional plastification harms the apparent strength of the adhesive joints, likely due to a decrease in cohesion strength.…”

Section: Resultsmentioning

confidence: 99%

“…Since the polymer matrix initially has a good tackiness, its additional plastification harms the apparent strength of the adhesive joints, likely due to a decrease in cohesion strength. However, the apparent strength of adhesive joints increases at a content of asphaltenes greater than 10% when they start to play the role of a filler reinforcing the polymer matrix [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 50 , 54 ]. The role of asphaltenes as solid particles increases to a maximum when their mass fraction reaches 30% and they form a structural network that effectively reinforces the adhesive, eventually causing the transition from cohesive to adhesive fractures of its adhesive joints.…”

Section: Resultsmentioning

confidence: 99%

“…The mixing of three polymers with an analogous chemical structure but different molecular weight is because a polymer should have wide molecular weight distribution in order to possess the set of rheological properties necessary to exhibit the characteristics of PSA: stickiness when pressed and retention of an adhesive bond after removal of the pressure [ 81 ]. The oligomeric polymer with low molecular weight provides tackiness, while the polymer with high molecular weight gives strength to the adhesive joint [ 45 , 82 ].…”

Section: Methodsmentioning

confidence: 99%

“…Their introduction makes it possible to improve the cohesive strength of PSA and increase its resistance to shear loads [ 40 ], but is accompanied by a slight decrease in stickiness and peel resistance. The most used fillers for PSA are montmorillonite [ 41 , 42 ], silicon dioxide [ 43 , 44 ], and wax [ 45 , 46 ], but some specialized fillers are also possible, e.g., graphene [ 47 ]. The introduction of nanosized fillers can lead to the creation of nanocomposites and the achievement of the most notable changes in the properties of final materials [ 48 , 49 ], and the most significant improvement in the properties occurs when applying nanofillers with anisometric particles, e.g., those that have the shape of plates [ 50 ]: montmorillonite [ 51 , 52 , 53 , 54 ] and graphene [ 55 , 56 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

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Asphaltene-Stabilized Polyisobutylene Pressure-Sensitive Adhesives for Ultraviolet Protection and Surface Bonding

et al. 2023

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The usual way to protect indoor areas from solar UV radiation is to use UV-absorbing materials, which are applied as a thin film on the surface of the windowpane. Asphaltenes are useless wastes from crude oil refining that absorb UV radiation well, which gave the idea of their use in protective coatings. Pressure-sensitive adhesives based on polyisobutylene containing from 5 to 30 wt% of asphaltenes were obtained. Deterioration of the adhesive properties with the introduction of 5–20 wt% of asphaltenes was shown by adhesion tests, which can be associated with the plasticization of the polymer matrix. At the same time, the use of 30 wt% of asphaltenes leads to the polymer matrix reinforcement with the restoration of adhesive properties to the original level or even slightly higher. The rheological study of adhesives at 25 °C and 120 °C showed the structural network formation by asphaltenes at a content of 30 wt%, explaining the increase in adhesion performance. According to microscopy, asphaltenes are flat brown glass shards in a polymer matrix. They absorb electromagnetic radiation, predominantly in the UV range, while maintaining relative translucency in the visible range. This makes it possible to obtain thin films from the asphaltene-filled adhesive for bonding glass sheets to produce UV-blocked and tinted windowpanes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Asphaltene-Stabilized Polyisobutylene Pressure-Sensitive Adhesives for Ultraviolet Protection and Surface Bonding

et al. 2023

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“…The remaining about 20% of the adhesive compositions are various additives, such as waxes [ 18 , 57 , 58 , 59 , 60 ], plasticizers [ 61 ], pigments, fillers [ 62 ], and antioxidants [ 63 ]. Plasticizers are the most frequently used.…”

Section: Introductionmentioning

confidence: 99%

Hot-Melt and Pressure-Sensitive Adhesives Based on Styrene-Isoprene-Styrene Triblock Copolymer, Asphaltene/Resin Blend and Naphthenic Oil

et al. 2022

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Asphaltene/resin blend (ARB) extracted from heavy crude oil was used to modify poly(styrene-block-isoprene-block-styrene) (SIS) to make it an adhesive. There were prepared double and triple mixtures containing 10–60% SIS, 10–40% ARB, and 10–50% naphthenic oil used as an additional plasticizer. The viscoelasticity of the mixtures at 25 °C and 120 °C was studied, their flow curves were obtained, and the temperature dependences of the loss tangent and the components of the complex modulus were measured. In addition, the mixtures were used as hot-melt adhesives (HMAs) and pressure-sensitive adhesives (PSAs) in the shear, peel, and pull-off tests of the adhesive bonds that they formed with steel. Both naphthenic oil and ARB act as plasticizers for SIS and make it sticky. However, only the combined use of ARB and the oil allows for achieving the best set of adhesive properties of the SIS-based mixture. High-quality HMA requires low oil content (optimal SIS/ARB/oil ratio is 50/40/10, pull-off adhesion strength (τt) of 1990 kPa), whereas a lot of the oil is needed to give SIS characteristics of a PSA (SIS/ARB/oil is 20/40/40, τt of 100 kPa). At the same time, the resulting PSA can be used as a hot-melt pressure-sensitive adhesive (HMPSA) that has many times lower viscosity than HMA (13.9 Pa·s versus 2640 Pa·s at 120 °C and 1 s−1) but provides a less strong adhesive bond (τt of 960 kPa).

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Polyisoprene grafted white carbon black reinforced polyisobutylene‐based pressure‐sensitive adhesives: Comprehensive enhancement of adhesive performances

Kang,

Feng,

Zhao

et al. 2024

Polymer Composites

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Nowadays, inorganic fillers are widely used to enhance pressure‐sensitive adhesives (PSAs), but inorganic fillers have problems with poor compatibility and agglomeration. Furthermore, these types of PSAs usually have an antagonistic effect: as the shear performance improves, the initial tack decreases. This severely limits the application of PSAs. Herein, white carbon black (WCB) grafted with polyisoprene (PI) was prepared and used to enhance polyisobutylene‐based PSAs, and the optimal reaction conditions of grafting were explored. The shear and peel strength of PSAs all increase with the increase of the mass fraction of fillers. When the filler content is less than 10 wt%, the initial tack of PSAs increases. When the filler content exceeds 10 wt%, the initial viscosity of PSAs decreases, but it is still far higher than that of the unmodified WCB‐reinforced PSAs system. In addition, the rheological performances of PSAs were tested, further exploring the role of particle grafting in PSAs.Highlights PSAs reinforced with white carbon black grafted with polyisoprene were prepared. The optimal conditions for modified white carbon black have been determined. The grafting fillers have improved all the performance of PSAs. The grafting of fillers significantly reduces the antagonistic effect of PSAs. Rheology was used to explore the effect of filler grafting in the PSAs.

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Polyethylene wax as an alternative to mineral fillers for preparation of reinforced pressure-sensitive adhesives

Cited by 16 publications

References 31 publications

Asphaltene-Stabilized Polyisobutylene Pressure-Sensitive Adhesives for Ultraviolet Protection and Surface Bonding

Asphaltene-Stabilized Polyisobutylene Pressure-Sensitive Adhesives for Ultraviolet Protection and Surface Bonding

Hot-Melt and Pressure-Sensitive Adhesives Based on Styrene-Isoprene-Styrene Triblock Copolymer, Asphaltene/Resin Blend and Naphthenic Oil

Polyisoprene grafted white carbon black reinforced polyisobutylene‐based pressure‐sensitive adhesives: Comprehensive enhancement of adhesive performances

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