Fabrication of Poly(butylene succinate) phosphorus-containing ionomers microcellular foams with significantly improved thermal conductivity and compressive strength

Ru, Ke; Zhang, Shuidong; Peng, Xiangfang; Wang, Junsheng; Peng, Huaqiao

doi:10.1016/j.polymer.2019.121967

Cited by 33 publications

(25 citation statements)

References 52 publications

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“…Injection molding and autoclave methods with scCO 2 as the blowing agent have produced a number of PBS foams with closed-cell structures. [90][91][92] Chemical blowing agents are also popular. [93][94][95] The focus of PBS foams research so far has been mainly on mechanical properties and the impact of processing aids such as plasticizers and cross-linking agents.…”

Section: Othersmentioning

confidence: 99%

Biobased foams for thermal insulation: material selection, processing, modelling, and performance

et al. 2021

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Section: Othersmentioning

confidence: 99%

Biobased foams for thermal insulation: material selection, processing, modelling, and performance

et al. 2021

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“…On the contrary, Foam atm-25% exhibited a lower T up than that of the control sample, indicating that its insulating capacity was enhanced. The loss of insulating capacity of Foam 800-25% despite its lower density could be related to an insufficient retention of the CO 2 coming from the synthesis due to the low-pressure conditions [ 44 , 45 ]. The T up at steady state of the cooling cycle was similar for all the composites, which implies a preservation of the insulating capacity at low temperature.…”

Section: Resultsmentioning

confidence: 99%

Effect of Foaming Formulation and Operating Pressure on Thermoregulating Polyurethane Foams

et al. 2021

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The synthesis of rigid polyurethane (RPU) foams containing thermoregulatory microcapsules has been carried out under reduced pressure conditions with a new foaming formulation to reduce the final composite densities. These optimized RPU foams were able to overpass the drawbacks exhibited by the previous composites over the studied temperature range, working as insulating and thermal energy storage materials. The change in the formulation allowed to decrease the final foam density and enhance their mechanical strength. The effect of the operating pressure (atmospheric, 800 mbar, and 700 mbar) and microcapsules content (up to 30 wt%) on the physical, mechanical, and thermal PU foam properties was studied. The reduction of the pressure from atmospheric to 800 mbar did not have any effect on the cell size, strut thickness, and compression strength 10% of deformation, the Young modulus being even higher at 800 mbar. Nevertheless, a strong impact on the microstructure and mechanical properties was observed for the foam composites obtained at 700 mbar. A deleterious impact on the RPU foams thermal conductivity was observed when using low-pressure conditions. Thermal analyses showed that a composite able to work as heat accumulator and thermal insulation both at transient and at steady state was achieved.

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“…For opened-cell structure, its stressed units display several contiguous defect bubble holes and are easy to collapse owing to reduce of the stressed units caused by the broken cell wall. 36 It was note that the deformation in the foams was heterogeneous in PLA4 and PLA5 and can be divided by dashed lines as shown in Figure 9. Highly densified regions have extended perpendicular to the compression direction with less deformed regions interluded them.…”

Section: Compression Propertiesmentioning

confidence: 99%

Cell structure and mechanical properties of microcellular PLA foams prepared via autoclave constrained foaming

Chen¹,

Yang

Chen³

et al. 2020

Cellular Polymers

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Microcellular polylactic acid (PLA) foams with various cell size and cell morphologies were prepared using supercritical carbon dioxide (sc-CO2) solid-state foaming to investigate the relationship between the cell structure and mechanical properties. Constrained foaming was used and a wide range of cell structures with a constant porosity of ∼75% by tuning saturation pressure (8–24 MPa) was developed. Experiments varying the saturation pressure while holding other variables’ constant show that the mean cell size and the mean cell wall thickness decreased, while the cell density and the open porosity increased with increase of pressure. Tensile modulus of PLA foams decreased with increasing the saturation pressure, but the specific tensile modulus of PLA foams was still 15–80% higher than that of solid PLA. Tensile strength and elongation at break first increased with increasing saturation pressure up to 16 MPa and then decreased with further increasing saturation pressure (20 MPa and 24 MPa) at which opened-cell structure produced. Compressive modulus, compressive strength, and compressive yield stress also followed the same variation trend. The results indicated that not only cell size plays an important role in properties of PLA foams but also cell morphology can influence these properties significantly.

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Fabrication of Poly(butylene succinate) phosphorus-containing ionomers microcellular foams with significantly improved thermal conductivity and compressive strength

Cited by 33 publications

References 52 publications

Biobased foams for thermal insulation: material selection, processing, modelling, and performance

Biobased foams for thermal insulation: material selection, processing, modelling, and performance

Effect of Foaming Formulation and Operating Pressure on Thermoregulating Polyurethane Foams

Cell structure and mechanical properties of microcellular PLA foams prepared via autoclave constrained foaming

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