Characterization and Properties of Thermoplastic Polyether Elastomer/Polyoxymethylene Blends Prepared by Melt-Mixing Method

An aluminum diethyl hypophosphite intercalation‐modified montmorillonite flame retardant (AlPi‐MMT) is successfully prepared and characterized by FT‐IR, SEM, and X‐ray diffraction. It is found that thermoplastic polyester elastomer (TPEE) composites incorporating 15 wt% AlPi‐MMT flame retardant exhibited better char formation and flame retardant properties compared to those incorporating 15 wt% (4:1, w:w) AlPi and MMT. And the char residual of TPEE/AlPi‐MMT at 700°C is 16.17%, which is higher than that of TPEE/AlPi‐MMT at 13.94%. and the former can pass UL‐94 V‐0 rating test while the latter can only pass UL‐94 V‐1 rating test. Afterwards, the combustion performance of TPEE composites is characterized, and it is found that the heat release and smoke release of TPEE/AlPi‐MMT are greatly reduced compared with those of pure TPEE and TPEE/AlPi/MMT, which is a flame retardant and smoke suppressant TPEE composite. Finally, by analyzing the residual char morphology and elements of TPEE composites after combustion, the mechanism of the flame retardant AlPi‐MMT to promote char formation and flame retardancy is demonstrated.

Section: Effect Of Alpi-mmt On the Fire Properties And Smoke Suppress...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of aluminum diethyl hypophosphite intercalation‐modified montmorillonite AlPi‐MMT and its effect on the flame retardancy and smoke suppression of thermoplastic polyester elastomer

Wang,

Wu,

Zhang

et al. 2023

“…The parameters t 0 corresponds to stress removal time, η r is the characteristic life and β r is the shape parameter. The instantaneous (elastic) deformation ε E ð Þwhich corresponds to the strain of Maxwell spring can be calculated by Equation (5);…”

Section: Creep and Recovery Behavior Of Samplesmentioning

confidence: 99%

“…Additionally, TPEs are widely used in polymer blend compositions, especially to increase the processability and improve the impact strength of rigid polymers such as polycarbonate, polylactic acid, liquid crystal polyester, and polyoxymethylene. [2][3][4][5] TPEEs are generally tougher over a broader temperature range than the other elastomers. TPEEs are segmented poly(ether-ester) block copolymers based on poly(butylene terephthalate) (PBT) as the crystalline phase and poly(tetramethylene oxide) (PTMO) as the rubbery phase.…”

Section: Introductionmentioning

confidence: 99%

“…Thermoplastic polyurethanes (TPUs), olefin block/random copolymers (TPOs), styrenic block copolymers (TPSs), thermoplastic polyamide elastomers (TPAs), and thermoplastic polyester elastomers (TPEEs) are commercially available TPEs and find a great variety of applications in automotive, sporting goods, fluid power, medical, electronic, food packaging, membranes, coatings, and polymer modifications. Additionally, TPEs are widely used in polymer blend compositions, especially to increase the processability and improve the impact strength of rigid polymers such as polycarbonate, polylactic acid, liquid crystal polyester, and polyoxymethylene 2–5 …”

Section: Introductionmentioning

confidence: 99%

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Morphological, thermal, and solid‐state viscoelastic properties of thermoplastic polyester elastomer‐graphitic carbon nitride composites

Ercan,

Boroglu

2023

In order to evaluate the effect of graphitic carbon nitride (g‐C3N4) incorporation on the physical properties of thermoplastic polyester elastomer (TPEE) composites using a comparative approach, the composite films were prepared by the solution mixing method and solvent evaporation methods. For this purpose, the g‐C3N4 nanoparticles were synthesized by direct thermal condensation reaction of melamine and characterized by FTIR, SEM, XRD, BET, and TGA, respectively. The diameters of the g‐C3N4 particles ranged from ∼90 to 480 nm and the g‐C3N4 exhibited a high thermal stability up to 570°C, which was attributed to the robust heptazine‐based structure. The morphology, structure, thermal stability, solid‐state viscoelastic behavior, and friction coefficient of the TPEE composites were evaluated depending on the composition. The results showed that the g‐C3N4 nanoparticles improved the thermal stability and reduced the friction coefficient of the TPEE films. It was also found that g‐C3N4 addition into the TPEE matrix significantly reduced the permanent deformation in the solid state. The findings indicate that low‐cost g‐C3N4 nanoparticles can be used as an effective additive to enhance the performance of TPEE films in various applications.

Morphological evolution and property changes of acrylate rubber/polyacetal thermoplastic vulcanizates during dynamic vulcanization process

Huang,

Gong,

Deng

2024

A new type of thermoplastic vulcanizates (TPV) that is resistant to hot oil, high temperature, and aging was prepared using acrylate elastomer (ACM) and polyoxymethylene (POM) as raw materials. The phase transition process and micromorphology development of the blends with the change of dynamic vulcanization (DV) time, and to illustrate the effects of the phase transition and the degree of elastomer phase crosslinking on the macroscopic properties of TPV were investigated. It was shown that ACM crosslinking occurs continuously during 0–8 min of DV, whereas the phase inversion process occurs predominantly during 0–3 min. In contrast, the cross‐section of the blends after phase inversion is flat, The constant elongation stress under small deformation, hardness, and permanent deformation after break are reduced, and the elongation at break, nonrelaxable modulus, and aging resistance are improved. The increase in the degree of vulcanization of the ACM phase resulted in a significant increase in the modulus of the blends under large deformation, an increase in the nonrelaxable modulus and relaxable modulus, an increase in the aging resistance, and a decrease in the elongation at tear were observed.