Preparation of cellulose nanoparticles/epoxy resin composites using the in-situ reaction method for strengthening and toughening epoxy resin film simultaneously

Li, Xiaobao; Xia, Wendy; Shen, Liming; Tan, Winston; Luo, Xinliang

doi:10.1016/j.matlet.2023.134790

Cited by 4 publications

(4 citation statements)

References 18 publications

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“…It is apparent from Figure S2a that the characteristic absorption peak of the epoxy group at 914 cm –1 disappeared in the above-mentioned cured blends. Besides, the DSC curves revealed no exothermic peaks after curing, indicating that all of the E51/DDM and PHMIEP/E51/DDM blends had been cured completely …”

Section: Resultsmentioning

confidence: 99%

“…Besides, the DSC curves revealed no exothermic peaks after curing, indicating that all of the E51/DDM and PHMIEP/ E51/DDM blends had been cured completely. 19 3.3. Mechanical Properties of the Cured PHMIEP/E51/ DDM and PRMIEP/E51/DDM Blends.…”

Section: Curingmentioning

confidence: 99%

“…As an effective means to improve the toughness of EPs, various kinds of toughening modifiers were introduced into the EP matrix to form a second phase. For the heterogeneous toughening process, the widely used toughening modifiers include rubbers, , thermoplastics, , core–shell polymers, , liquid crystal polymers, , block polymers (BCPs), , nanomaterials, , and topological structures. , However, the immiscibility between EPs and modifiers will inevitably lead to an opaque curing system with high viscosity, which seriously limited the applications of EPs in the fields of electronic packaging, engineering plastics, coatings, etc. On the other hand, hyperbranched polymers, , biobased materials, , and epoxy prepolymers with flexible segments , are typical modifiers added in homogeneous toughening systems .…”

Section: Introductionmentioning

confidence: 99%

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High-Impact Epoxy Resins with Superior Hydrophobicity Toughened by Epoxy Functionalized Poly(olefin-alt-maleimide) Derivatives

Shen,

Chen,

Lin

et al. 2024

ACS Appl. Polym. Mater.

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The inherent disadvantages of low toughness and high brittleness severely limit the widespread applications of epoxy resins (EPs), and it is highly desirable to toughen EPs while maintaining their rigidity and thermal properties. Herein, a type of epoxy functionalized poly[1-hexene-alt-N-(2-methoxymethyl oxirane)maleimide] (PHMIEP) was specially designed and synthesized by the self-stabilized precipitation polymerization (2SP) of 1-hexene and maleic anhydride, followed by imidization, hydroxymethylation, and epoxidation. Due to the presence of both rigid cyclic maleimide units and flexible pendant butyl groups, epoxy functionalized PHMIEP can serve as an effective toughening modifier for EPs. With 4,4-diaminodiphenylmethane as the curing agent, the EPs with 5 phr PHMIEP showed a record-high impact strength and tensile strength of 54.04 kJ/m 2 and 95.84 MPa, which were 121 and 23% higher than the neat EPs, respectively. Moreover, the PHMIEP-modified EPs exhibited similar thermal stability and glass-transition temperature to those of the neat EPs. More impressively, the resultant EPs showed superior hydrophobicity in comparison to the unmodified EPs due to the incorporation of hydrophobic imide and alkyl segments. Furthermore, in order to reduce the preparation cost, complex olefinic mixtures derived from the cracking product of raffinate oil were used directly to replace 1-hexene. The EPs modified with poly[cracked raffinate oilalt-N-(2-methoxymethyl oxirane)maleimide] (PRMIEP) also showed excellent comprehensive properties. Due to the highly enhanced toughness, higher strength, and comparable thermal stability, the PHMIEP/PRMIEP-toughened EPs demonstrate great potential as a high-performance resin matrix for application in the fields of electronic packaging, coating, and engineering plastics.

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Section: Resultsmentioning

confidence: 99%

Section: Curingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Impact Epoxy Resins with Superior Hydrophobicity Toughened by Epoxy Functionalized Poly(olefin-alt-maleimide) Derivatives

Shen,

Chen,

Lin

et al. 2024

ACS Appl. Polym. Mater.

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show abstract

“…Thus, it is of great importance to modify EP to improve its mechanical properties. Silane coupling agents are widely applied as additives in EP adhesives to improve this problem [16][17][18]. In some research, via the application of a coupling agent, the durability of the interfacial bond was significantly enhanced because the hydrogen bonding plays a large role in the degradation of the interfacial bond between epoxy and substrate [19,20].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Presence of a Silane Coupling Agent on Reaction Kinetics of Cationic Thermopolymerization of Epoxy Resin Adhesive

Chen,

Li,

Zhang

et al. 2023

Coatings

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The effect of the presence of a silane coupling agent containing different functional groups on the reaction kinetics and physical properties of epoxy resin generated via cationic thermopolymerization was investigated. The kinetics of cationic polymerization of epoxy resin was studied using a nonisothermal DSC method. The polymerization is propagated by activated chain end (ACE) and activated monomer (AM) processes. With an increase in silane content, the ACE apparent activation energy first decreased and then increased, while the AM apparent activation energy increased. Moreover, the shear strength, coefficient of linear thermal expansion, gelation time, environmental testing of damp heat, and steady state with varied contents of silane coupling agents were evaluated. The results indicated that the presence of a silane coupling agent has more adhesion and lower water absorption than pure EP. The coefficient of linear thermal expansion and gelation time increased with the increase in silane content, while the water absorption decreased with the increase in silane content. Comparing the overall performance of three silane coupling agents used in the research, the curing system obtained by blending with vinyltrimethoxysliane (VTS) is a much better option for practical application as an adhesive.

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Preparation and Performance of MWNTs/ Epoxy Resins Composites

Lv,

Wu,

Zhao

2024

J Inorg Organomet Polym

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Preparation of cellulose nanoparticles/epoxy resin composites using the in-situ reaction method for strengthening and toughening epoxy resin film simultaneously

Cited by 4 publications

References 18 publications

High-Impact Epoxy Resins with Superior Hydrophobicity Toughened by Epoxy Functionalized Poly(olefin-alt-maleimide) Derivatives

High-Impact Epoxy Resins with Superior Hydrophobicity Toughened by Epoxy Functionalized Poly(olefin-alt-maleimide) Derivatives

Effect of the Presence of a Silane Coupling Agent on Reaction Kinetics of Cationic Thermopolymerization of Epoxy Resin Adhesive

Preparation and Performance of MWNTs/ Epoxy Resins Composites

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