The effect of PCL/PEG ABA block lengths on the crystallization of homo/block- based polyurethane/CNW nanocomposites

Nourany, Mohammad; Ghelichkhani, Shadi; Sarkhosh, Hadi; Zakizadeh, Mehrad; Behrouz, Toktam

doi:10.1007/s10965-020-02376-y

Cited by 14 publications

(32 citation statements)

References 35 publications

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“…Presence of the peak is also confirmed by the peak at 1543 cm −1 , attributed to bending vibrations of NH groups. The absorbance peak available at 1604 cm −1 is for the C═O group in the urethane functionality (NHC(═O)O) 20 . The main characteristic peaks of the specimens are summarized in Table 3.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of waterborne polyurethane nanocomposite adhesives of bio‐based polyol from rapeseed cake residual and cellulose nanowhisker

Mosayebi

Sadeghi

Jamjah

2021

J of Applied Polymer Sci

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In this research work, we synthesize a series of waterborne polyurethane (WPU) bio‐nanocomposite adhesives from bio‐based polyols, extracted from rapeseed cake residual (RCR) by oxypropylation procedure, and cellulose nanowhisker (CNW). The hydroxyl‐ (OH) number of the polyols, as the first variable parameter, is controlled through tuning oxypropylation degree by changing propylene oxide (PO) to RCR ratio. From the four prepared polyols, WPU of Polyol‐2 (WPU2) shows the most significant shear strength for wood and glass adhesion substrates. Polyurethane nanocomposites of CNW, with three different weight contents of 0.25, 0.50, and 1.0%, are prepared from WPU2, as the optimum WPU, and the WPU2 nanocomposite of WPU2‐0.50 wt% show the highest shear strength for all types of the substrates. For the WPU2 and WPU2‐0.50 wt% adhesives, the wood‐wood substrate show a high shear strength of 12.8 and 15.1 MPa, respectively. This work revealed that the shear strength of the adhesives and their failure mechanisms are affected by the structural parameters, OH‐number, and CNW content.

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Section: Resultsmentioning

confidence: 99%

Synthesis of waterborne polyurethane nanocomposite adhesives of bio‐based polyol from rapeseed cake residual and cellulose nanowhisker

Mosayebi

Sadeghi

Jamjah

2021

J of Applied Polymer Sci

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“…Crystallization and its extent, and thermosetting all affect the viscoelastic properties of the polymer chains and can be elucidated from DMTA results. 17 B1 to B3, which is correlated to the increased crystallization of the soft domain chains. 17 The changes for tPUs with PEG 2000 block are more intense compared to the tPUs with PEG 1000 block.…”

Section: Phase Behavior Analysismentioning

confidence: 98%

“…The unreacted CL and PEG molecules are further removed. 12,17 Table 1 provides the formulation recipe for synthesis of the block copolymers. The weightaveraged molecular weights (M w ) and polydispersity index (PDI) of the synthesized block copolymers (polyols) are also reported in Table 1.…”

Section: Synthesis Of Block Copolymersmentioning

confidence: 99%

“…[13][14][15] However, with respect to tPU nanocomposites, the onepot synthesis procedure removes the need for extra processes and the possibility of nanoparticle migration and clustering. 16,17 In recent years, PUs with relatively more complex structures have emerged indicating the attempt to develop biomaterials with a multi-purpose role. 18,19 Preparation of macroporous TPU/hydroxyapatite (HA) nanocomposites modified with Polydopamine (PDA), 20 synthesis of tPUs of PCL/PEG and cellulose nanocrystals (CNCs) 11,12,17 are recent examples of these attempts.…”

Section: Introductionmentioning

confidence: 99%

“…16,17 In recent years, PUs with relatively more complex structures have emerged indicating the attempt to develop biomaterials with a multi-purpose role. 18,19 Preparation of macroporous TPU/hydroxyapatite (HA) nanocomposites modified with Polydopamine (PDA), 20 synthesis of tPUs of PCL/PEG and cellulose nanocrystals (CNCs) 11,12,17 are recent examples of these attempts. Besides the structural versatility, the PUs also possess an inherent shape memory behavior which makes them a great candidate to build bulk and surface stimuli-responsive substrates for cell culture in the tissues' dynamic environment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A novel multi‐functional model thermoset and PDA‐coated PU nanocomposite based on graphene and an amphiphilic block copolymer

Behrouz

Behrooz

Sarkhosh

et al. 2022

Polymers for Advanced Techs

Self Cite

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Solid polymer nanocomposite electrolytes based on poly(ε‐caprolactone)‐based waterborne polyurethane–polyethylene oxide and fluorine‐doped carbon quantum dot‐MXene

Naderkhani,

Rostami,

Mokhtari

et al. 2024

Polymers for Advanced Techs

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The need for higher energy storage capability has encouraged researchers to move toward lithium‐metal batteries (LMBs). Due to the safety issue associated with liquid electrolytes, solid polymer electrolytes (SPEs) the main focus on polyethylene oxide (PEO) were at the center of the research. However, high crystallization, fast decomposition, and low thermomechanical stability has limited its application. Low lithium‐ion transference number () is another issue leading to polarization of the SPEs and consequently, triggering dendrite nucleation and growth. Here, we developed a series of SPEs based on PEO‐waterborne polyurethane (WPU) and nanoparticles of fluorine‐doped carbon quantum dot (fCQD) and MXene. The host polymer matrix was a blend of poly(ε‐caprolactone) (PCL)‐based WPU and PEO. The use of WPU and the nanoparticles increased the thermomechanical stability and suppressed PEO crystallinity through disrupting the spherulites growth and reducing the thermal stability of the crystallites. Using the WPU led to significant increase in () compared with previous reports. The prepared SPEs showed high‐electrochemical stability and ionic conductivity at and based on the results of cycling performance, a discharge capacity of 120.58 mAh/g and coulombic efficiency of 99.1% was achieved after 200 cycles.

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The effect of PCL/PEG ABA block lengths on the crystallization of homo/block- based polyurethane/CNW nanocomposites

Cited by 14 publications

References 35 publications

Synthesis of waterborne polyurethane nanocomposite adhesives of bio‐based polyol from rapeseed cake residual and cellulose nanowhisker

Synthesis of waterborne polyurethane nanocomposite adhesives of bio‐based polyol from rapeseed cake residual and cellulose nanowhisker

A novel multi‐functional model thermoset and PDA‐coated PU nanocomposite based on graphene and an amphiphilic block copolymer

Solid polymer nanocomposite electrolytes based on poly(ε‐caprolactone)‐based waterborne polyurethane–polyethylene oxide and fluorine‐doped carbon quantum dot‐MXene

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