3D printable robust shape memory PET copolyesters with fire safety <i>via</i> π-stacking and synergistic crosslinking

Chen, Lin; Zhao, Haibo; Ni, Yan‐Peng; Fu, Teng; Wu, Wan‐Shou; Wang, Xiuli; Wang, Yu‐Zhong

doi:10.1039/c9ta04187g

Cited by 80 publications

(43 citation statements)

References 48 publications

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“…However, the π–π hydrogel showed a crossover where G ′= G ′′ at frequency of 12 rad s −1 (Supporting Information, Figure S9 B) and G ′ was greater than G ′′ at higher frequencies, indicating more solid like properties. These results confirm that the anthracene group plays an important role in stabilizing hydrogel network through forming additional π–π crosslinking …”

Section: Resultssupporting

confidence: 75%

Strong, Self‐Healable, and Recyclable Visible‐Light‐Responsive Hydrogel Actuators

et al. 2020

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The most pressing challenges for light-driven hydrogel actuators include reliance on UV light, slowresponse,poor mechanical properties,a nd limited functionalities.N ow, as upramolecular design strategy is used to address these issues.K ey is the use of ab enzylimine-functionalized anthracene group,w hich red-shifts the absorption into the visible region and also stabilizes the supramolecular network through p-p interactions.Acid-ether hydrogen bonds are incorporated for energy dissipation under mechanical deformation and maintaining hydrophilicity of the network. This double-crosslinked supramolecular hydrogel developed via as imple synthesis exhibits au nique combination of high strength, rapid self-healing,and fast visible-light-driven shape morphing both in the wet and dry state.Asall of the interactions are dynamic, the design enables the structures to be recycled and reprogrammed into different 3D objects.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Section: Resultssupporting

confidence: 75%

Strong, Self‐Healable, and Recyclable Visible‐Light‐Responsive Hydrogel Actuators

et al. 2020

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“…There is one wide and sharp diffraction peak which is ranging from 10° to 50° in the diagram, which indicates that PSPPY resin is slightly crystalline at room temperature. Interplanar spacing (d) for the peak at 19.8° is 4.48 Å. π‐Stacking peak of phenylacetylene groups at about 28.5° is overlapped in the wide diffraction peak due to the introduction of polar 2, 6‐diphenoxypyridine structure. The regularity of molecular chain is disturbed by polar 2, 6‐diphenoxypyridine structure for PSPPY resin …”

Section: Resultsmentioning

confidence: 99%

Synthesis and Properties of a Silicon‐Containing Arylacetylene Resin with 2,6‐Diphenoxypyridine Unit

Liu

et al. 2020

ChemistrySelect

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A novel silicon-containing arylacetylene resin called poly (dimethylsilylene-ethylene-phenoxypyridyloxy-phenyleneethylene) (PSPPY) was made from 2,6-bis(4-ethynyl-phenoxy) pyridine and dimethyldichlorosilane by Grignard reactions. The structure and properties of the resin were characterized by 1 H-NMR, FT-IR, GPC, XRD, DSC, TGA and universal testing machine. The resin has a wide processing window ranged from 35°C to 155°C. The cured resin shows excellent mechanical property, low dielectric property and high thermal stability. The flexural strength of the cured resin at room temperature reaches 58.7 MPa. The cured resin has dielectric constant 3.0-3.5, dielectric loss 0.008-0.040 in the frequency of 10 À 1 -10 6 Hz, and low water uptake (0.8 %). The degradation temperature at 5 % weight loss and the residue at 800°C of the cured resin arrive at 500°C and 77.1 % in nitrogen atmosphere, respectively.[a] Dr.

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“…As shown in Figure 8(a) and (b), both printed samples exhibited high combustibility, and serious melt drippings were generated during the combustion process, which was due to the low melt viscosity of PA12 (Wudy et al 2014). It is known that melt dripping causes secondary damage and aggravates fire accidents (Chen et al 2019). For the neat PA12 and PA12/GBs composite, the flame propagated unceasingly, suggesting inferior flame retardance.…”

Section: Flammabilitymentioning

confidence: 98%

A detailed evaluation of surface, thermal, and flammable properties of polyamide 12/glass beads composites fabricated by multi jet fusion

Guo

Luo

et al. 2021

Virtual and Physical Prototyping

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Multi jet fusion (MJF) is an emerging powder three-dimensional (3D) printing technology with an ultrafast printing speed, in which polyamide 12 (PA12) is the main material currently utilised. Although structurally sophisticated 3D components have been printed by MJF, there are limitations due to the high cost of printing materials and inferior performance of the printed parts. Here, PA12/glass beads (PA12/GBs) composites with improved performance were manufactured via the MJF technique. Incorporating GBs effectively regulated the dimensional accuracy. Furthermore, the composite possessed lower surface roughness and higher surface hardness than neat PA12. Thermal analysis showed that the composite exhibited an enhanced decomposition temperature (390°C) and char yield (38.4 wt.%) compared to neat PA12. Remarkably, the incorporation of GBs did not improve the flame retardance of neat PA12. We identified the improved functionalities of PA12/GBs composites in terms of dimensional accuracy, surface, and thermal properties and analysed possible mechanisms for the observed increased flammability.

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3D printable robust shape memory PET copolyesters with fire safety via π-stacking and synergistic crosslinking

Abstract: Multifunctional 3D printable polymers with fire safety are achieved from general PET by the π–π stacking and the synergistic crosslinking between phenylacetylene and phenylimide groups.

Cited by 80 publications

References 48 publications

Strong, Self‐Healable, and Recyclable Visible‐Light‐Responsive Hydrogel Actuators

Strong, Self‐Healable, and Recyclable Visible‐Light‐Responsive Hydrogel Actuators

Synthesis and Properties of a Silicon‐Containing Arylacetylene Resin with 2,6‐Diphenoxypyridine Unit

A detailed evaluation of surface, thermal, and flammable properties of polyamide 12/glass beads composites fabricated by multi jet fusion

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