High clarity polyurethane laminating adhesives based on poly (propylene glycol). Effect of hard segment on microphase morphology, haze and adhesion

McCreath, S.; Boinard, P.; Boinard, E.; Gritter, P.; Liggat, John

doi:10.1016/j.ijadhadh.2022.103168

Cited by 3 publications

(1 citation statement)

References 24 publications

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“…When adding 0.5 wt% APAl-12C/lilaurate to the iPP matrix, the haze value of the iPP composite is only 9.89%, which is lower than that of NA-21 at the same concentration. From this, we can draw the conclusion that the substitution of the lauroyloxy group reduces the overall polarity of APAl-12C/lilaurate, making the dispersion of APAl-12C/lilaurate in the iPP more uniform than NA-21, thus improving the optical properties of the iPP [46]. This conjecture can also be verified from the POM images of the iPP/A12C-Li composite and the iPP/NA-21 composite.…”

Section: The Optical Property For the Ipp/a12c-li Compositessupporting

confidence: 58%

The Influence of Metal Lithium and Alkyl Chain in the Nucleating Agent Lauroyloxy-Substituted Aryl Aluminum Phosphate on the Crystallization and Optical Properties for iPP

et al. 2022

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In this work, a kind of aryl phosphate salt nucleating agent (APAl-12C) was synthesized, which was replaced in the hydroxyl group on the aluminum hydroxy bis [2,2′-methylene-bis(4,6-di-tert-butylphenyl) phosphate] (APAl-OH) by lauroyloxy, which could improve the dispersion between the nucleating agent and the iPP matrix and reduce the migration potential of the nucleating agent in the iPP matrix by increasing the molecular weight. The structure of the nucleating agent APAl-12C was analyzed by fourier infrared spectroscopy (FT-IR ) and 1H NMR. The differential scanning calorimeter (DSC) results indicated that the addition of APAl-OH or APAl-12C alone was inferior to the commercial nucleating agent NA-21 (compounds of APAl-OH and Lithium laurate) in terms of the crystallization behavior, which may be due to the importance of metal Li in the crystallization property. Thus, the iPP/A12C-Li composites were prepared with APAl-12C, lithium laurate (lilaurate) and the iPP matrix. The crystallization behavior, morphology, optical and mechanical properties for the iPP/A12C-Li composites were systematically studied and compared with that of the iPP/NA-21 composite. Among the iPP/A12C-Li composites with the addition of 0.5 wt%, APAl-12C/Lilaurate had the fastest crystallization rate and reduced the haze value of the neat iPP from 36.03% to 9.89% without changing the clarity, which was better than that of the iPP/NA-21 composite. This was due to the weakening of the polarity of the APAl-12C after lauroyloxy substitution and better dispersion in the iPP matrix, resulting in a significant improvement in the optical properties.

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Section: The Optical Property For the Ipp/a12c-li Compositessupporting

confidence: 58%

The Influence of Metal Lithium and Alkyl Chain in the Nucleating Agent Lauroyloxy-Substituted Aryl Aluminum Phosphate on the Crystallization and Optical Properties for iPP

et al. 2022

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Exploiting the Base‐Triggered Thiol/Vinyl Ether Addition to Prepare Well‐Defined Microphase Separated Thermo‐Switchable Adhesives

Lamas,

Polo Fonseca,

Moussard

et al. 2024

Adv Funct Materials

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Switchable adhesives are materials of utmost importance due to their capability of having their adhesion/cohesion properties reversibly triggered upon stimuli, allowing on‐demand surface attaching/detaching. Still, several challenges mainly associated with complex uncontrolled chemical processes hinders their production. In this study, it is found that unexpectedly vinyl ethers are able to react with thiols in the presence of a catalytic concentration of base, which allows the preparation of well‐defined phase‐separated switchable adhesives. Indeed, these findings show that base‐catalyzed thiol‐acrylate and thiol‐vinyl ether are highly orthogonal, making the acrylate reaction faster. This is explored to react in the first stage thiols with acrylates in the presence of vinyl ethers to end‐cap all the oligomers with stable vinyl ethers and suppress undesirable disulfide formation. In a second stage the UV‐triggered thiol‐ene “click reaction” is carried out, forming the network. It is shown that the network prepared by this approach presents superior adhesion due to greater backbone length, a controlled crosslinking motif, and better‐defined microphase separation. Additionally, the adhesives made by this strategy are thermo‐switchable due to the temperature‐triggered base‐catalyzed thioether dynamic covalent character at 200 °C. Despite providing superior adhesive properties, the proposed technology endows scalable, thermo‐switchable, and O2‐resistant adhesives with huge industrialization potential.

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Analysis of matrix properties on ballistic mechanisms of aramid fabric composites: From experiment to numerical simulation

Han,

Wang,

Zhang

et al. 2023

Chemical Engineering Journal

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High clarity polyurethane laminating adhesives based on poly (propylene glycol). Effect of hard segment on microphase morphology, haze and adhesion

Cited by 3 publications

References 24 publications

The Influence of Metal Lithium and Alkyl Chain in the Nucleating Agent Lauroyloxy-Substituted Aryl Aluminum Phosphate on the Crystallization and Optical Properties for iPP

The Influence of Metal Lithium and Alkyl Chain in the Nucleating Agent Lauroyloxy-Substituted Aryl Aluminum Phosphate on the Crystallization and Optical Properties for iPP

Exploiting the Base‐Triggered Thiol/Vinyl Ether Addition to Prepare Well‐Defined Microphase Separated Thermo‐Switchable Adhesives

Analysis of matrix properties on ballistic mechanisms of aramid fabric composites: From experiment to numerical simulation

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