Analysis of holding power in the blends of poly(butyl acrylate) with poly(vinylidene fluoride-cohexafluoro acetone)

Kano, Yoshihisa; Akiyama, Saburo; Miyagi, Zenichi

doi:10.1002/(sici)1097-4628(19980502)68:5<727::aid-app5>3.0.co;2-q

Cited by 5 publications

(2 citation statements)

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“…Theoretical modeling of non-crosslinked PSAs behavior in the static shear test predicting the time to failure of the adhesive joint on the basis of rheological measurements was performed by Zosel [6] and Kano et al [46]. It was found that the model predicts the time to failure for low molecular weight PIB fairly well, whereas it underestimates the experimental results for high molecular weight polymer.…”

Section: Modelingmentioning

confidence: 99%

Rheology and adhesive properties of filled PIB-based pressure-sensitive adhesives. I. Rheology and shear resistance

Kostyuk¹,

Ignatenko²,

Смирнова³

et al. 2014

Journal of Adhesion Science and Technology

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Two nanosized fillers (fumed silica Rosil-175 up to 20 wt% and halloysite nanotubes up to 40 wt%) were used to suppress cold flow of polyisobutylene (PIB)-based adhesives. Rheological measurements revealed the presence of the yield stress in the PIB-halloysite system which is indicative of the three-dimensional network formation in the bulk of the matrix. However, further rheology tests identified low strength of the network. In case of Rosil, no yield stress was detected, only gradual increase in the viscosity. Shear bank testing showed 4-5 times increase in the PIB-halloysite system time to failure when 40 wt% of halloysite was incorporated into the PIB matrix. Increase in the time to failure for PIB-Rosil systems was over two orders of magnitude -at the Rosil content up to 20 wt%. Such superior properties of the Rosil adhesion joints are considered to be the result of Rosil high specific area and low strength of the halloysite nanotubes network.

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Section: Modelingmentioning

confidence: 99%

Rheology and adhesive properties of filled PIB-based pressure-sensitive adhesives. I. Rheology and shear resistance

Kostyuk¹,

Ignatenko²,

Смирнова³

et al. 2014

Journal of Adhesion Science and Technology

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“…The reproducibility of the peel test is signi cantly affected by several factors such as temperature, humidity, and peel rate. Because of the complications, in the use of these methods, sometimes large experimental uncertainties as well as the qualitative nature of data must be tolerated [12,13]. Eventually, this will hinder the optimization of PSA properties via tailoring of molar mass, crosslink density, and the amount/ type of adhesion promoters.…”

Section: Introductionmentioning

confidence: 99%

A new method based on application of cyclic strain to evaluate the durability of pressure sensitive adhesives

Sohn¹

2003

Journal of Adhesion Science and Technology

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The development of PSAs suitable for speci c applications requires an optimization of the two most essential properties: suf cient bond strength and clean removability. The latter is conveniently obtained by controlling the mode of debonding to an interfacial failure, yet the issue of bond strength is challenging since the optimum bond strength must be available in the same failure mode. More complication arises from the fact that the methods, such as peel and creep tests, used to evaluate the bond strength are often qualitative and the results obtained may not accurately reveal the effects of various PSA design parameters. In the present study, a new method, named cyclic strain application (CSA) test, is devised to evaluate the durability of PSAs. A key feature of this test is that by applying a controlled cyclic strain on a PSA / substrate interface we can quantitatively monitor the temporal stress variation as well as the time for interfacial failure (t f ). As a result, the effects of various PSA design parameters, such as molar mass, blending with low molar mass fractions, adhesion promoters, and the level of crosslinking on PSA durability can be clearly seen. Other factors being equal, higher molar mass samples showed greater t f , while, blending with low molar mass fractions led to a reduced t f . The use of a strong adhesion promoter, as anticipated, increased t f . However, it should be noted that excessive bond strength may lead to a cohesive failure, which is detrimental in the design of good PSAs. From a comparison of t f with peel strength, it was clearly shown that t f , the key parameter obtained from the CSA test, had a strong correlation with peel strength. In addition, some other information, such as the detailed in uences of the level of crosslinking and molar mass on PSA durability was also obtained from the CSA test. Lastly, some important PSA design concepts and other examples utilizing the CSA test are presented.

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Synthesis of polyurethane acrylates by hydrogenated castor oil and dimer‐based polyester diol and study on pressure‐sensitive adhesive

Ren

Hui-ming

et al. 2005

J of Applied Polymer Sci

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Synthesis of polyurethane acrylate (PUA) and preparation of the UV-cured pressure-sensitive adhesives (PSA) are reported. Molecular weight (M w ) (by gel permeation chromatography) and viscosity (*) of PUA were measured. Characterization of PUA and PSA before and after UV-curing was made by FTIR. Increase of the hydroxyls from hydrogenated castor oil/hydroxyls from dimer-based polyester diol (OH HCO /OH Diol ) ratio decreased the M w and * value of PUA. Dynamic viscoelastic properties (by dynamic rheological spectrometer) and performance of the UV-cured PSA were also studied. Increase of the OH HCO /OH Diol ratio increased the storage modulus (GЈ), the loss modulus (GЉ), and complex viscosity (Eta*) of the UV-cured PSA, which, in turn, enhanced holding power and shear adhesion failure temperature (SAFT) and yet decreased peeling strength. Substitution of OB for DBTDL depressed the M w and * value of PUA, while the GЉ and Eta* values of the UV-cured PSA were elevated, which, in turn, increased the holding power and SAFT and yet depressed the peeling strength. Elevation of the tackifying resin content depressed the GЈ, GЉ, and Eta* values of the cured PSA and yet increased glass transition temperatures (T g ) of PSA, measured by differential scanning calorimetry. Peeling strength of PSA elevated as increasing the tackifying resin, while the holding power and SAFT fell.

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Analysis of holding power in the blends of poly(butyl acrylate) with poly(vinylidene fluoride-cohexafluoro acetone)

Cited by 5 publications

References 0 publications

Rheology and adhesive properties of filled PIB-based pressure-sensitive adhesives. I. Rheology and shear resistance

Rheology and adhesive properties of filled PIB-based pressure-sensitive adhesives. I. Rheology and shear resistance

A new method based on application of cyclic strain to evaluate the durability of pressure sensitive adhesives

Synthesis of polyurethane acrylates by hydrogenated castor oil and dimer‐based polyester diol and study on pressure‐sensitive adhesive

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