Development of spiropyran bonded bio-based waterborne polyurethanes for mechanical-responsive color-variable films

Wang, Kunpeng; Deng, Yipeng; Wang, Tao; Wang, Qidong; Qian, Chenggen; Zhang, Xingyuan

doi:10.1016/j.polymer.2020.123017

Cited by 17 publications

(9 citation statements)

References 34 publications

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“…borne PU for mechanochromism, where soybean oil modified with hydroxyl groups as polyols were used to synthesize the PU. [127] Di-bromo SP was synthesized to prepare polymers with alternating SP and stiff fluorene units via SPC. [91] SP was copolymerized with 9,9-dioctylfluorene (F8) boronate ester using palladium catalyst to afford SP containing fluorene copolymers P(SP-alt-F8) (Figure 5A).…”

Section: Isomerization-based Mechanochromophoresmentioning

confidence: 99%

Mechanochromophore‐Linked Polymeric Materials with Visible Color Changes

Qiu

Scofield

Gurr

et al. 2022

Macromol. Rapid Commun.

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Mechanical force as a type of stimuli for smart materials has obtained much attention in the past decade. Color‐changing materials in response to mechanical stimuli have shown great potential in the applications such as sensors and displays. Mechanochromophore‐linked polymeric materials, which are a growing sub‐class of these materials, are discussed in detail in this review. Two main types of mechanochromophores which exhibit visible color change, summarized herein, involve either isomerization or radical generation mechanisms. This review focuses on their synthesis and incorporation into polymer matrices, the type of mechanical force used, factors affecting the mechanochromic properties, and their applications.

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Section: Isomerization-based Mechanochromophoresmentioning

confidence: 99%

Mechanochromophore‐Linked Polymeric Materials with Visible Color Changes

Qiu

Scofield

Gurr

et al. 2022

Macromol. Rapid Commun.

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“…35,36 So, the weak peak of epoxy group appeared at 860 cm À1 . 37,38 The particle size distribution of the three kind of aqueous polyurethane were investigated using a particle size analyzer. The detail values of average particle sizes and polydispersity index (PDI) of all samples were recorded in Table 3.…”

Section: Characterizationmentioning

confidence: 99%

Development of soybean oil‐based aqueous polyurethanes and the effect of hydroxyl value on its properties

Lou

Dai

Jiang

et al. 2022

Polymers for Advanced Techs

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A series of soybean oil-based polyols were synthesized via the reaction between epoxidized soybean oil and 1,3-propanediol, trimethylolpropane and xylitol, respectively. The aqueous polyurethanes were synthesized by prepared soybean oil-based polyols. The effect of hydroxyl value of soybean oil-based polyols on the mechanical, thermal, hydrophobic properties of the aqueous polyurethane films were also investigated. The results showed that the OH value of polyol increased, the T g of aqueous polyurethane films increased from 30.04 to 88.28 C and the water contact angle of materials improved from 80.80 to 98.20 . Besides, water absorption reduced from 40.25% to 2.40%. Also, all samples were placed in the 1 wt% sodium hydroxide solution at 45 C to test the degradation behaviors. After 24 h, the results demonstrated that aqueous polyurethane synthesized by the highest hydroxyl value (251.00mgKOH/g)polyol had the lowest degradation rate(7.10%). Finally, the mechanical properties and morphology of the aqueous polyurethane film after degradation were investigated, which proved that the hydroxyl value affected the mechanical properties and morphology of the aqueous polyurethane film after degradation.

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“…In recent decades, many new materials and polymers have been developed that respond to various stimuli. [1-3] A controlled chemical reaction [4], modification of polymer properties by changing the temperature [5], the pH [6], the absorption of electromagnetic radiation [7] or the action of mechanical [8], magnetic [9] or electrical forces [10] have been described in the literature. More specifically, thermoresponsive polymers change their properties by changing temperature beyond the classical glass transition and melting.…”

Section: Introductionmentioning

confidence: 99%

ABA Type Amphiphiles with Poly(2-Benzhydryl-2-Oxazine) Moieties: Synthesis, Characterization and Inverse Thermogelation

Hahn¹,

Keßler²,

Polzin³

et al. 2021

Preprint

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<div>Thermoresponsive polymers are frequently discussed for various applications. Here, we introduce a novel amphiphilic triblock copolymer, which undergoes inverse thermogelation, i.e. is forms a physical gel upon cooling. The polymers comprises poly(2-benzhydryl-2-oxazine) as the hydrophobic building block, a polymer which has not been reported to date. The physical gels are surprisingly strong with a storage modulus of 22 kPa at 25 wt.% in water. In addition, relatively high yield and flow points were determined by rheology.</div>

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Development of spiropyran bonded bio-based waterborne polyurethanes for mechanical-responsive color-variable films

Cited by 17 publications

References 34 publications

Mechanochromophore‐Linked Polymeric Materials with Visible Color Changes

Mechanochromophore‐Linked Polymeric Materials with Visible Color Changes

Development of soybean oil‐based aqueous polyurethanes and the effect of hydroxyl value on its properties

ABA Type Amphiphiles with Poly(2-Benzhydryl-2-Oxazine) Moieties: Synthesis, Characterization and Inverse Thermogelation

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