Synergic effects of poly(vinyl butyral) on toughening epoxies by nanostructured rubbers

Yang, Biao; Wang, Weiyi; Huang, Jingsong

doi:10.1016/j.polymer.2015.09.027

Cited by 22 publications

(13 citation statements)

References 101 publications

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“…The stress field ahead of the primary crack causes secondary cracks to form from defects on different planes than the primary crack . These secondary cracks propagate radially from their defect origins.…”

Section: Bcps As Toughening Agents For Epoxy Resinsmentioning

confidence: 99%

Innovative materials of this era for toughening the epoxy matrix: A review

2018

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This review aims to bring to light the potential efficiency of various materials as toughening agents for epoxy thermosets. The area of epoxy toughening has fascinated material scientists since toughened epoxies are employed as the appropriate candidates in a wide arena of applications. Based on the structure–property relationships, the traditional chemistry approaches have been tried so far to toughen the epoxy matrix. With the advent of the era of nanotechnology, the field of epoxy toughening has also gained momentum through the utilization of various types of modified and unmodified nanofillers in the epoxy matrix. In fact many new materials have replaced the conventional agents in the field of epoxy toughening. We are giving a comprehensive review which hints the various mechanisms of toughening as well as the novel materials used in the present scenario as potential toughening agents in the epoxy matrix with special reference to rubber, block copolymers, and nanofillers. POLYM. COMPOS., 39:E1959–E1986, 2018. © 2018 Society of Plastics Engineers

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Section: Bcps As Toughening Agents For Epoxy Resinsmentioning

confidence: 99%

Innovative materials of this era for toughening the epoxy matrix: A review

2018

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“…Preparation of the PVB resin blends has been reported in the literature. Some instances are PVB/PVDF , epoxy/PVB/liquid rubber , PVB/PEG , and PMMA/PVB blends . However, the blends containing plasticized PVB film have been also studied.…”

Section: Introductionmentioning

confidence: 99%

Effect of morphology development on the crystallization behavior, dynamic mechanical properties, and toughness of the PA‐6/plasticized PVB/organoclay nanocomposites

2017

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PA-6/PVB blends and related nanocomposites with organoclay were prepared via melt-processing and structure-property relationships were comprehensively investigated. The SEM observations showed that blend composition and organoclay content play significant roles in the development of morphology. The differential scanning calorimetry results revealed occurrence of fractionated crystallization in the blends due to development of co-continuous morphology. In contrast, the degree of fractionated crystallization decreased in the nanocomposites owing to role of the nanoclay as heterogeneous nucleating agent. It was found that there is an interesting relationship between morphology development and dynamic mechanical properties of the blends. Furthermore, the effects of the morphology development and nanoclay on the viscoelastic behavior of the nanocomposites were synergistic and/or counteracting depending on the Cloisite 30B content. The PA-6/PVB blends with co-continuous morphology showed outstanding toughness. In addition, the PA-6/PVB50 blend with low nanoclay concentration exhibited high impact strength, which was originated from low interparticle distance between PVB domains in the matrix. POLYM. COMPOS., 00:000-000, 2017.

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“…The latter might be an effect of the reduction of shielding phenomena, since the optimum particle size for efficient toughening depends on the relative size of the plastic zone , and hence, the loading situation and the morphology at the crack tip. The inclusion size and the concentration in EP/BCP (8 wt%) may have already reached an optimum value with respect to a particle size to plastic zone size‐ratio, impeding a further toughening by zone shielding mechanisms , if the modifier concentration is increased to 10 wt% for the present materials. Furthermore, Azimi et al and Karger‐Kocsis and Friedrich stated that an increasing particle volume fraction causes a decreasing Paris exponent in case of rubber particle modified systems.…”

Section: Discussionmentioning

confidence: 86%

Fatigue crack propagation in triblock copolymer toughened epoxy nanocomposites

Klingler

Wetzel

2017

Polymer Engineering & Sci

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This study systematically investigates the influence of a Polymethylmethacrylate‐block‐Polybutylacrylate‐block‐Polymethylmethacrylate (PMMA‐b‐PBuA‐b‐PMMA) triblock copolymer (BCP) on the flexural properties, the static fracture toughness and especially the resistance to fatigue crack propagation (FCP) of a cycloaliphatic amine cured bisphenol A based epoxy resin (EP). The results show that already small concentrations of BCP can significantly improve fracture toughness and the resistance to fatigue crack propagation. Crack growth rate as well as the Paris' law exponent m were considerably reduced from m = 15.5 of the neat epoxy to m = 8.1 for the BCP toughened materials. Simultaneously, the resistance to fatigue crack propagation was found to increase drastically from a critical stress intensity factor range normalΔKIc of 0.39 MPam to 0.81 MPam. Fractography and structural analysis reveal that the improved resistance to fatigue crack propagation correlates to crack shielding and zone shielding mechanisms caused by the synergistic interaction of BCP‐rich domains and dispersed nanometer sized, presumably BCP‐rich particles in epoxy‐rich regions. POLYM. ENG. SCI., 57:579–587, 2017. © 2017 Society of Plastics Engineers

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Synergic effects of poly(vinyl butyral) on toughening epoxies by nanostructured rubbers

Cited by 22 publications

References 101 publications

Innovative materials of this era for toughening the epoxy matrix: A review

Innovative materials of this era for toughening the epoxy matrix: A review

Effect of morphology development on the crystallization behavior, dynamic mechanical properties, and toughness of the PA‐6/plasticized PVB/organoclay nanocomposites

Fatigue crack propagation in triblock copolymer toughened epoxy nanocomposites

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