Influence of annealing on the permeation properties of a thermoplastic elastomer

Puentes‐Parodi, Alejandro; Santoro, Leandro A.; Ferreira, Ignatius; Leuteritz, Andreas; Kuehnert, Ines

doi:10.1002/pen.25181

Cited by 9 publications

(7 citation statements)

References 20 publications

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“…This process can change the polyurethane mechanical properties, as it can be associated with changes in the modulus of elasticity and ultimate tensile strength. [35][36][37] This reorganization was observed during PU annealing and depended on the annealing time, temperature, and presence of liquids like water between the polymer chains. None of the treatment cycles seem to have an impact on the endothermal events, suggesting that the excipient solutions do not induce any remarkable change in the organization of hard domains.…”

Section: Discussionmentioning

confidence: 99%

Surface and mechanical properties of polyurethane central venous catheters after repeated contact with chemotherapy excipient solutions

et al. 2023

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This article investigates the impact of the interactions between polyurethane central venous catheters and solutions containing excipients used in cisplatin and paclitaxel formulations. Changes to the properties of catheters and the leaching of catheter additives into the infused solutions were studied while these solutions were infused cyclically for several months. Chemotherapy treatment was mimicked in vitro in compliance with hospital practices. The treatment cycle was repeated 10 times, using solutions containing only the excipients. After 10 treatment cycles, no physical or chemical degradation of the catheter was observed. Mechanical performances were stable, but surface modifications occurred, causing the surface to become more hydrophobic. A loss in polyurethane antioxidant amount was observed in part due to a leaching phenomenon.

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Section: Discussionmentioning

confidence: 99%

Surface and mechanical properties of polyurethane central venous catheters after repeated contact with chemotherapy excipient solutions

et al. 2023

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“…It leads to the better mechanical properties. 26 From the experimental results, it can be seen that for 3D printed TPU products, heat treatment can allow them to effectively improve their toughness and strength while maintaining their original shape.…”

Section: Effect Of Heat Treatment On the Mechanical Properties Of 3d ...mentioning

confidence: 98%

Effect of heat treatment on the performance of 3D printed thermoplastic polyurethane flexible substrates

Kang

et al. 2023

J of Applied Polymer Sci

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3D printing technology combined with thermoplastic polyurethane (TPU) is increasingly being used in flexible electronics. However, the defects induced by 3D printing may degrade the mechanical properties of the TPU substrates significantly and result in the decrease in breaking elongation, tensile strength, and waterproof performance. In this article, we investigate the effect of heat treatment on improving the mechanical and waterproof properties of TPU substrate experimentally. The results show that heat treatment can effectively reduce the defects such as bubbles and pores inside the 3D printed TPU structure and increase the bonding area of the filament, and thus making the 3D printed TPU structure dense. After heat treatment at 180 C, the tensile strength and elongation at break of 3D printed TPU samples in the fiber direction (filling angle of 0 ) increased by 67% and 38%, respectively. The tensile strength and elongation at break in the bonding direction (filling angle of 90 ) increased by 100% and 75%. In addition, the waterproof performance of the samples has been enhanced, and the water contact angle of the surface has increased from 90.4 to 95.25 . Therefore, the heat treatment can effectively improve the mechanical properties and waterproof performance of 3D printed TPU samples.

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“…The chemical shifts at 1.18−1.21 ppm could be related to CH 3 (i, j) at the side chain. Combined with FT-IR and 1 H NMR spectra, it can be concluded that the copolymers are successfully prepared as addressed in Scheme 2.…”

Section: Dsc and Thermogravimetric Analysismentioning

confidence: 98%

“…As one of the most widely used polymer materials, thermoplastic elastomers (TPEs) exhibit elasticity at ambient temperature and can be processed easily by melt processing techniques or injection molding . TPEs such as poly(styrene-butadiene- b -styrene)s, poly(ether-urethane)s, poly(ester-ether)s, and poly(ether-amide)s have been widely used as films, gas-separation membranes, shape-memory materials, self-healing materials, and sealing materials .…”

Section: Introductionmentioning

confidence: 99%

Semi-Aromatic Polyether Amide Thermoplastic Elastomer: Nucleophilic Substitution Polymerization and Properties

Wen

Li²,

Yang

et al. 2023

Ind. Eng. Chem. Res.

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Different from the traditional electrophilic polymerization method of thermoplastic elastomer, here, we adopted a new nucleophilic reaction route, which did not need extreme high temperature and vacuum condition to prepare a novel kind of semi-aromatic thermoplastic polyether amide elastomers. First, difluoro-terminated semi-aromatic di-amide monomer containing long chain ether (or 1,12-diaminododecane) was synthesized through facile interfacial electrophilic substitution reaction. Then, they were conducted to react with hydroquinone under atmospheric pressure to yield polyether amide elastomer. Additionally, a small amount of branched structure with trifluoro-terminated semi-aromatic amide monomer was designed and further introduced into the polymer chain to adjust the mechanical property. These semi-aromatic polyamide elastomers were found to have excellent thermal properties with glass transition temperature (T g) of −39.5 to −34.8 °C, melting temperature (T m) of 227.3–260.4 °C [which is much higher than that of the commercial products such as Pebax5533 (Arkema, Paris, France) (T m = 159 °C)], the 5% weight-loss temperature (T d,5%) of 376.3–408.7 °C, and Vicat softening temperature of 73.0–223.6 °C. The mechanical properties of these resultant elastomers were good and can be controlled with different copolymerization ratios of soft, hard, and branched segments. The tensile strength, elongation at break, and elasticity modulus were in the range of 9.8–23.4 MPa, 87.6–712.3%, and 30.8–362.0 MPa, respectively. Besides, such a series of copolymers showed a relatively low water absorption of 1.57–3.67%. Interestingly, it was found that these resultant polyether amide elastomers had better organic solvent resistance and acid–base corrosion than the traditional TPAE-containing ester bond (−COO−) in the polymer molecular chain. It can be potentially applied in the chemical mechanical seal, especially in the high temperature and corrosion environment.

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Influence of annealing on the permeation properties of a thermoplastic elastomer

Cited by 9 publications

References 20 publications

Surface and mechanical properties of polyurethane central venous catheters after repeated contact with chemotherapy excipient solutions

Surface and mechanical properties of polyurethane central venous catheters after repeated contact with chemotherapy excipient solutions

Effect of heat treatment on the performance of 3D printed thermoplastic polyurethane flexible substrates

Semi-Aromatic Polyether Amide Thermoplastic Elastomer: Nucleophilic Substitution Polymerization and Properties

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