Synthesis and characterization of interpenetrating polymer networks (IPNs) based on UV curable resin and blocked isocyanate/polyols

Liu, Jie; Miao, Pengcheng; Zhang, Wenwen; Song, Guanjun; Feng, Jiale; Leng, Xuefei; Li, Yang

doi:10.1016/j.polymer.2022.125254

Cited by 14 publications

(9 citation statements)

References 42 publications

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“…As the crosslinking density increased, the molecular motion of the polymer chains became more restricted, and higher temperatures were required for the iEbcc‐TAEA‐x to transform from the glassy to the rubbery state. [ 44 ] The T g obtained by DSC showed a similar trend.…”

Section: Resultsmentioning

confidence: 54%

Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO₂‐Derived Six‐membered Cyclic Carbonates

Liu

Miao

Leng

et al. 2023

Macromol. Rapid Commun.

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Non‐isocyanate polyurethanes (NIPUs) are widely studied as sustainability potential, because they can be prepared without using toxic isocyanates in the synthesis process. The aminolysis of cyclic carbonate to form NIPUs is a promising route. In this work, a series of NIPUs is prepared from renewable bis(6‐membered cyclic carbonates) (iEbcc) and amines. The resulting NIPUs possess excellent mechanical properties and thermal stability. The NIPUs can be remolded via transcarbamoylation reactions, and iEbcc‐TAEA‐10 (the molar ratio of tris(2‐aminoethyl)amine in amines is 10%) still get a recovery ratio of 90% in tensile stress after three cycles of remolding. In addition, the obtained materials can be chemically degraded into bi(1,3‐diol) precursors with high purity (>99%) and yield (>90%) through alcoholysis. Meanwhile, the degraded products can be used to regenerate NIPUs with similar structures and properties as the original samples. The synthetic strategy, isocyanate‐free and employing isoeugenol and carbon dioxide (CO2) as building blocks, makes this approach an attractive pathway to NIPU networks taking a step toward a circular economy.

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Section: Resultsmentioning

confidence: 54%

Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO₂‐Derived Six‐membered Cyclic Carbonates

Liu

Miao

Leng

et al. 2023

Macromol. Rapid Commun.

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“…This additional polymerization led to a higher entanglement extent of polymer chains and the presence of abundant hydrogen bonds. [ 17 ] However, an excessively long thermal treatment hold time (6 h) resulted in a deterioration of the tensile strength from 27.5 to 15.0 MPa. This decrease was due to the breakage of newly generated yet unstable HUBs under prolonged thermal treatment.…”

Section: Resultsmentioning

confidence: 99%

“…However, even with the advancement of the LSVP system in extending the processable viscosity range of VPP‐used resin, the mechanical properties of the printed parts were still unsatisfactory due to the insufficient entanglement of the polymer backbone composed of C─C single bonds formed by the free radical polymerization of (meth)acrylates. [ 17 ] The low conversion of double bonds further contributed to this limitation, influenced by factors such as curing depth and efficiency. [ 18 ] To address this issue, UV post‐curing [ 19 ] and thermal treatment [ 20 ] as supplementary measures are adopted to enhance the mechanical properties of the printed parts by increasing the conversion of the C═C double bond.…”

Section: Introductionmentioning

confidence: 99%

3D Printing of High Viscosity UV‐Curable Resin for Highly Stretchable and Resilient Elastomer

Huang,

Peng,

Zheng

et al. 2023

Advanced Materials

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Vat photopolymerization prepared elastomers usually exhibit unsatisfied mechanical properties due to their insufficient growth of molecular weight upon UV exposure. Increasing the weight ratio of oligomer in the resin system is an effective approach to enhance the mechanical properties, yet the viscosity of the UV‐curable resin increased dramatically which makes it difficult to be used. Here, a linear scan‐based vat photopolymerization (LSVP) system which can print high‐viscosity resin was carried out to 3D print the oligomer‐dominated UV‐curable resin via a dual‐curing mechanism. Briefly, a polyurethane methacrylate blocking (PUB) oligomer is first synthesized and then mixed with a commercialized bifunctional oligomer, photoinitiator, and primary amine as a chain extender to prepare high‐viscosity UV‐curable resin for LSVP system. Through thermal treatment, deblocked isocyanate is further crosslinked with a chain extender to construct a highly entangled polymer chain network. The optimal thermal treatment parameters are investigated. Simultaneously, the resilience of the 3D‐printed elastomer was evaluated by continuous tensile loading and unloading tests. Subsequently, complex structured elastomers were printed, exhibiting favorable mechanical durability without defects. The results obtained from this work will provide a reference for preparing elastomeric devices with excellent physical properties and expand the application fields of vat photopolymerization.This article is protected by copyright. All rights reserved

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“…[ 8 ] In full IPN each polymer component polymer forms a cross‐linked network that is intertwined with the other polymer network and bears the properties of both polymers. [ 9 ] The utmost benefit of IPN‐based systems is the highly entangled network resulting in mechanically strengthened composites.…”

Section: Introductionmentioning

confidence: 99%

Mussel‐inspired double cross‐linked interpenetrating network with unique mechanical properties using di‐diol complexation

et al. 2023

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Polymer nanocomposites with exceptionally high mechanical properties owing to strong interfacial attraction have garnered tremendous interest in the research community. In general, tough and robust polymer nanocomposites are usually obtained via dispersing a nano‐flaky filler in the polymer matrix, although the strategy is only sometimes practically viable. To this end, in this work, a facile strategy has been adopted to achieve a strong and tough polymer nanocomposite. A novel mussel‐inspired full interpenetrating polymeric network (IPN) consisting of polyvinylalcohol and polydopamine was prepared. This technique helped integrate the advantages of dopamine chemistry with forming a full IPN using Borax as a common crosslinker. The infusion of 1 wt% acid‐modified carbon nanotubes (ACNT) in the IPN matrix helped greatly improve the current state‐of‐the‐art. The synergistic effect of nano‐reinforcement and formation of ester linkage through a substantial amount of di‐diol complexation dominated and accounted for the significant enhancement of mechanical properties. This is further supported by decreased intensity of free OH groups in the FTIR investigations, viscosity enhancement from rheological behavior, and temperature‐dependent dynamic mechanical property analysis. Such an IPN structure is a promising way to enhance mechanical properties.

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Synthesis and characterization of interpenetrating polymer networks (IPNs) based on UV curable resin and blocked isocyanate/polyols

Cited by 14 publications

References 42 publications

Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO₂‐Derived Six‐membered Cyclic Carbonates

Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO₂‐Derived Six‐membered Cyclic Carbonates

3D Printing of High Viscosity UV‐Curable Resin for Highly Stretchable and Resilient Elastomer

Mussel‐inspired double cross‐linked interpenetrating network with unique mechanical properties using di‐diol complexation

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Synthesis and characterization of interpenetrating polymer networks (IPNs) based on UV curable resin and blocked isocyanate/polyols

Cited by 14 publications

References 42 publications

Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO2‐Derived Six‐membered Cyclic Carbonates

Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO2‐Derived Six‐membered Cyclic Carbonates

3D Printing of High Viscosity UV‐Curable Resin for Highly Stretchable and Resilient Elastomer

Mussel‐inspired double cross‐linked interpenetrating network with unique mechanical properties using di‐diol complexation

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Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO₂‐Derived Six‐membered Cyclic Carbonates

Chemically Recyclable Biobased Non‐Isocyanate Polyurethane Networks from CO₂‐Derived Six‐membered Cyclic Carbonates