Simultaneous improvements in the cryogenic tensile strength, ductility and impact strength of epoxy resins by a hyperbranched polymer

Yang, Jiao‐Ping; Chen, Zhenkun; Guo, Yang; Fu, Shao‐Yun; Ye, Lin

doi:10.1016/j.polymer.2008.05.008

Cited by 174 publications

(108 citation statements)

References 39 publications

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“…These nanocomposites are solutions to future automotive applications, for instance gas tanks, interior and exterior panels, and aircraft applications such as high performance components and flame retardant panels. Some of them are already commercially employed, such as in golfclubs, tennis racket and hockey stick ANASA report described epoxy nanocomposites as a potential candidate for ayogenic storage application [107]. These nanocomposites show more commercial prominence in advanced composites, since weight reduction is believed to be the primary driving factor to this application.…”

Section: Prospect Of Applicationsmentioning

confidence: 99%

From clay to graphene for polymer nanocomposites—a survey

et al. 2014

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The development of aerospace and automotive industries requests lightweight, high-paformance materials, and polymer nanocomposites are ideal candidates in this case, which is shown by the increasingly more publications in this research field over the past two decades. However, the performance of nanocompositenot only depend on the properties of their individual constituents, but on their morphology and surface characteristics of fillers as well. Selections of nanofille~ geometries, e.g. particulate, fibrous or layered have a tremendous influence on the properties of nanocomposites and their processing methods. In this paper, we review the chronological works performed in the field of polymer nanocomposites, in particular epoxy nanocomposites reinforced with layered fillers, such as clay and gitiphene. Surprisingly layered fillers are commercially available and more costeffective than nanoparticles and carbon nanofibres, and these make them to the most extensively studied fillers that can be geared toward future applications, particularly in large-scale polymer nanocomposite production.

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Section: Prospect Of Applicationsmentioning

confidence: 99%

From clay to graphene for polymer nanocomposites—a survey

et al. 2014

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“…This result is similar to those reported elsewhere, which could be explained by the bigger internal cavities and lower ultimate conversion in hybrids containing HBPSi of higher M n . [53][54][55][56] Thus, HBPSi-3 shows effective toughening effect just like HBPSi-2 does, while HBPSi-1 doesn't have obvious effect on the toughness improvement of the matrix because of its low contribution to the increase of the fractional free volume.…”

Section: 50mentioning

confidence: 99%

Simultaneous reinforcement and toughness improvement of an epoxy–phenolic network with a hyperbranched polysiloxane modifier

et al. 2018

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An epoxy-phenolic network is modified with hyperbranched polysiloxane (HBPSi). The addition of HBPSi-2, which has medium molecular weight, can significantly decrease the viscosity of the uncured epoxyphenolic system and increase the crosslinking density and homogeneity of the cured crosslinking network. With 10% HBPSi-2, the mechanical properties of the samples are improved comprehensively: tensile modulus and maximum strength increase by 11.4% and 36.2%, respectively, while elongation at break and impact strength increase by 153.8% and 186.7%, respectively. The comprehensive improvements in the mechanical properties are attributed to combined effects of crosslinking density, network rigidity, cohesive density and the matrix-modifier compatibility. What is more, HBPSi-2 also significantly increases the char yield of the material and decreases the thermal weight loss rate, indicating an improved thermal stability. All these results may provide a new strategy for toughness and strength improvement of the epoxy-phenolic network.

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“…[9,[25][26][27][28] Tailoring of HBP structure and their use as polymeric modifiers in epoxy formulations can improve the properties of the resulting thermosets. In this work, we have synthesized a new flexible hyperbranched PAE with hydroxyl groups as chain ends and secondary alkyl ester groups in the repetitive unit.…”

Section: Synthesis and Characterization Of Paementioning

confidence: 99%

Synthesis of a New Hyperbranched Polyaminoester and Its Use as a Reactive Modifier in Anionic Curing of DGEBA Thermosets

Morell

Fernández‐Francos

Ramis

et al. 2010

Macro Chemistry & Physics

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The synthesis and characterization of a new hyperbranched PAE with a flexible structure and terminal hydroxyl groups is reported. The influence of PAE in the anionic curing of DGEBA with 1‐methylimidazole was studied. The curing reaction was investigated by DSC and FT‐IR. The covalent incorporation of the modifier in the matrix was proven. The addition of PAE to the formulation reduced the contraction on curing. The modified materials were more thermally degradable than neat DGEBA thermosets, which is advantageous from the point of view of their reworkability. Their Tgs were reduced by the flexibility introduced by the aliphatic structure of PAE. SEM microscopy on the fractured surface of cured samples revealed a homogeneous morphology and a possible effect of PAE as a toughness enhancer.

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Simultaneous improvements in the cryogenic tensile strength, ductility and impact strength of epoxy resins by a hyperbranched polymer

Cited by 174 publications

References 39 publications

From clay to graphene for polymer nanocomposites—a survey

From clay to graphene for polymer nanocomposites—a survey

Simultaneous reinforcement and toughness improvement of an epoxy–phenolic network with a hyperbranched polysiloxane modifier

Synthesis of a New Hyperbranched Polyaminoester and Its Use as a Reactive Modifier in Anionic Curing of DGEBA Thermosets

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