Phase state and rheology of polyisobutylene blends with silicone resin

Ilyin, Sergey O.; Makarova, V. V.; Polyakova, M. Yu.; Куличихин, В. Г.

doi:10.1007/s00397-020-01208-6

Cited by 31 publications

(11 citation statements)

References 81 publications

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“…Thereby, asphaltenes act as reinforcing particles at the room temperature, and as plasticizers at elevated ones. Wherein, the mixture containing 10 wt% of asphaltenes can be considered as an example of a molecular nanocomposite, [ 77‐79 ] since the size of both asphaltene molecules and their nanoaggregates is of the order of a few nanometers and the asphaltenes are dissolved in the medium of block copolymer (ie, deagglomerated to a nanoscale level). At higher asphaltene content, the strength decreases to its initial value, probably due to the agglomeration of asphaltenes.…”

Section: Resultsmentioning

confidence: 99%

Asphaltenes as a tackifier for hot‐melt adhesives based on the styrene‐isoprene‐styrene block copolymer

Ignatenko

Kostyuk

Смирнова

et al. 2020

Polymer Engineering & Sci

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The use of heavy crude oil asphaltenes and resins (termed asphaltenes) as the components of hot‐melt adhesives based on the styrene‐isoprene triblock copolymer was considered. The rheological, thermophysical, strength, and adhesive characteristics of the mixtures containing from 10 to 40 wt% of asphaltenes were studied. The addition of 10 to 20 wt% of asphaltenes enhanced the strength and adhesive properties of the mixtures and only slightly changed their rheology. The higher concentrations of asphaltenes reduced the viscosity of the mixtures but did not lead to improved characteristics of the adhesives. The ambiguous effect of asphaltenes is probably due to their uneven distribution between the microphases of the block copolymer as well as their ability to act both plasticizers and reinforcing particles depending on temperature. A comparison of asphaltenes and conventional tackifiers based on hydrocarbon resins revealed their comparable effect on the properties of the block copolymer.

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Section: Resultsmentioning

confidence: 99%

Asphaltenes as a tackifier for hot‐melt adhesives based on the styrene‐isoprene‐styrene block copolymer

Ignatenko

Kostyuk

Смирнова

et al. 2020

Polymer Engineering & Sci

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“…Nevertheless, if we examine the dependences of the moduli on the Cole–Cole plot (the insert in Figure 2 ), then they overlap regardless of the asphaltene content. This means that the structure of all samples is very similar [ 95 ], i.e., asphaltenes do not fundamentally change the structure of hot PIB at 120 °C.…”

Section: Resultsmentioning

confidence: 99%

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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“…When mixing two liquids, the blend viscosity often obeys the logarithmic additivity rule, according to which the logarithm of the blend viscosity is the weighted average of the logarithms of the component viscosities [ 111 , 112 ]: log η 12 = φ 1 log η 1 + φ 2 log η 2 , where φ 1 and φ 2 are the volume fractions of the components, while η 12 , η 1 , and η 2 are the viscosities of a binary mixture and its first and second components, respectively. In the case of blending polymers, this relation may not be performed if the components are immiscible, or the rheological properties of the mixture depend on its morphology [ 113 , 114 ].…”

Section: Resultsmentioning

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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Phase state and rheology of polyisobutylene blends with silicone resin

Cited by 31 publications

References 81 publications

Asphaltenes as a tackifier for hot‐melt adhesives based on the styrene‐isoprene‐styrene block copolymer

Asphaltenes as a tackifier for hot‐melt adhesives based on the styrene‐isoprene‐styrene block copolymer

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

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