Morphology evolution and thermodynamic behavior of the “soft core hard shell” structure formed by reactive amino triblock in epoxy resin

Zhou, Quan; Yu, Yueru; Liu, Qi; Zhuang, Yuxiao; Lv, Yizhe; Song, Ning; Ni, Lizhong

doi:10.1007/s10853-020-05258-2

Cited by 4 publications

(4 citation statements)

References 43 publications

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“…Upon introduction of P‐CNC, a gradual reduction in the storage modulus of P‐CNC/PBA‐a was observed, to the extent that it even dipped lower than the case with CNC addition (as illustrated in Figure S5, and tabulated in Table S5). This finding serves to validate the influence of the flexible shell on the storage modulus of P‐CNC/PBA‐a 51–53 . Furthermore, Figure 2F systematically compares the thermal and mechanical properties of the composite materials to those of pure PBA‐a, revealing these composite materials not only preserve thermal qualities but also elevate mechanical properties.…”

Section: Resultsmentioning

confidence: 54%

“…This finding serves to validate the influence of the flexible shell on the storage modulus of P-CNC/PBA-a. [51][52][53] Furthermore, Figure 2F systematically compares the thermal and mechanical properties of the composite materials to those of pure PBA-a, revealing these composite materials not only preserve thermal qualities but also elevate mechanical properties. This augmentation holds the potential to broaden their industrial applications.…”

Section: Mechanical and Thermal Performances Of P-cnc/pba-a Modified ...mentioning

confidence: 99%

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Enhancing comprehensive performances of polybenzoxazine through integration of soft core–soft shell cellulose‐based nanoparticles

Wang,

Han,

Jiang

et al. 2024

Polymer Composites

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To further increasing the toughness performance of thermoset resins without sacrificing their other properties is still a challenge task. In this study, the soft core–soft shell nanoparticles based on polydopamine‐modified cellulose nanocrystals (P‐CNC) were synthesized and seamlessly integrated with Bisphenol A‐aniline benzoxazine (BA‐a). Notably, the results underscore the remarkable impact of a mere 0.2 wt% of P‐CNC on BA‐a, boosting the impact strength of the modified system to 19.5 kJ/m2. This achievement represents a substantial 140.7% increase compared with pure polybenzoxazine. Moreover, the flexural strength reaches 133.4 MPa, surpassing pure polybenzoxazine by 16.2%. And the modified system exhibits a 10% weight loss temperature (Td10) at 321.7°C, accompanied by a char yield of 27.6%. This holistic approach results in a notable enhancement of the toughness performance while concurrently maintaining the flexural strength and the thermal stability of the modified system. Consequently, the integration of soft core–soft shell nanoparticles emerges as a promising strategy for enhancing thermoset resin properties without undermining their existing exceptional attributes.Highlights The core–shell nanoparticles were made by dopamine and cellulose nanocrystals. The core–shell nanoparticles can enhance the toughness of polybenzoxazine. Nanoparticle‐matrix interactions and deformation led to improved properties.

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Section: Resultsmentioning

confidence: 54%

Section: Mechanical and Thermal Performances Of P-cnc/pba-a Modified ...mentioning

confidence: 99%

Enhancing comprehensive performances of polybenzoxazine through integration of soft core–soft shell cellulose‐based nanoparticles

Wang,

Han,

Jiang

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…Usually, two kinds of block copolymers, unreactive and reactive block copolymers, are used to toughen epoxy resins 25–29 . As a result, various ordered or disordered nanostructures or microstructures such as spherical domains, wormlike structure, lamellar morphology, core/shell cylinders, and bilayer vesicles are formed in block copolymer modified epoxy resins 6,30–33 . The mechanisms of self‐assembly, reaction‐induced microphase separation, and the combination of both are proposed to be responsible for the formation of various nano or microstructures, which are dependent on the interactions between the block copolymers, epoxy resins and curing agents.…”

Section: Introductionmentioning

confidence: 99%

“…[25][26][27][28][29] As a result, various ordered or disordered nanostructures or microstructures such as spherical domains, wormlike structure, lamellar morphology, core/ shell cylinders, and bilayer vesicles are formed in block copolymer modified epoxy resins. 6,[30][31][32][33] The mechanisms of self-assembly, reaction-induced microphase separation, and the combination of both are proposed to be responsible for the formation of various nano or microstructures, which are dependent on the interactions between the block copolymers, epoxy resins and curing agents. However, for epoxy resins toughened by reactive block copolymers, a homogeneous microstructure is usually formed due to the reactivity between the block copolymer and epoxy resin.…”

mentioning

confidence: 99%

Synthesis of poly(hydroxyethyl methacrylate)‐b‐poly(propylene glycol)‐b‐poly(hydroxyethyl methacrylate)reactive block copolymer with controlled reactivity for toughening multifunctional epoxy resin

Zhu

Tang

et al. 2022

J of Applied Polymer Sci

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Multifunctional epoxy resins are inherently brittle due to the extremely high cross‐linking density, thus the enhancement in the toughness is rather important for the industrial application. In this work, a reactive poly(hydroxyethyl methacrylate)‐b‐poly(propylene glycol)‐b‐poly(hydroxyethyl methacrylate) (PHEMA‐PPG‐PHEMA) is synthesized by using an atom transfer radical polymerization to toughen trifunctional diglycidyl 4,5‐epoxy cyclohexane‐1,2‐dicarboxylate (TDE‐85). A controllable system is constructed, in which the reaction temperature of TDE‐85 with the hydroxyl of PHEMA‐PPG‐PHEMA is lower than with the curing agent. As a result, both heterogeneous and homogeneous structures can be formed in composites through controlling reaction temperature. It is found that the toughness of composites with the heterogeneous structure is effectively improved without sacrificing the tensile strength, tensile modulus, and glass transition temperature. Specifically, the mode‐1 critical stress intensity factor and critical strain energy release rate of TDE‐85/10 wt% PHEMA‐PPG‐PHEMA are increased to 0.77 MPam1/2 and 146 J/m2, respectively, which are effectively enhanced by 32.8% and 70.3%. This can be ascribed to combined toughening effects from the cavitation of the PHEMA‐PPG‐PHEMA phase, the matrix shear yielding, and the enhanced interface bonding strength due to the reaction between TDE‐85 and PHEMA‐PPG‐PHEMA. Thus, this study paves a novel strategy to improve the toughness of epoxy resin by controlling the curing reaction.

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Preparation of styrene–butyl acrylic latex films with impact resistance properties and their applications as water-based damping coating

Zhang,

Wang

et al. 2023

Progress in Organic Coatings

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Morphology evolution and thermodynamic behavior of the “soft core hard shell” structure formed by reactive amino triblock in epoxy resin

Cited by 4 publications

References 43 publications

Enhancing comprehensive performances of polybenzoxazine through integration of soft core–soft shell cellulose‐based nanoparticles

Enhancing comprehensive performances of polybenzoxazine through integration of soft core–soft shell cellulose‐based nanoparticles

Synthesis of poly(hydroxyethyl methacrylate)‐b‐poly(propylene glycol)‐b‐poly(hydroxyethyl methacrylate)reactive block copolymer with controlled reactivity for toughening multifunctional epoxy resin

Preparation of styrene–butyl acrylic latex films with impact resistance properties and their applications as water-based damping coating

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