Mechanical behavior of epoxy systems using microencapsulated amino-functional siloxanes

Knop, W; Meier, Márcia Margarete; Pezzin, Sérgio Henrique

doi:10.1063/1.4965555

Cited by 2 publications

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References 16 publications

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“…Conceptually, self-healing polymers containing microcapsules filled with an agent of regeneration, usually monomers and / or primers, dispersed in the polymer matrix. If eventually a crack is generated in the material, this will find the microcapsule that will be broken, releasing the regeneration agent into the crack, which, in turn, will polymerize preventing crack propagation [3][4][5]. This paper shows a kinetic and calorimetric study by DSC of the cure process of the resin bisphenol A diglycidyl ether (DGEBA) (Fig.…”

Section: Introductionmentioning

confidence: 99%

Differential Scanning Calorimetry study on curing kinetics of diglycidyl ether of bisphenol A with amine curing agents for self-healing systems

2017

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Epoxy resin is one of the most important polymeric matrixes for diverse uses, such as aeronautical, mobile, electronics and others. Providing a material capable of self-healing microcracks will allow it to have a more reliable and longer use. In order to study this new property of self-healing to an epoxy resin, a Differential Scanning Calorimetry (DSC) study was carried out to measure physical chemical properties such as activation energy, enthalpy of polymerization, order of reaction and pre-exponential factor based on an Arrhenius equation modelling. The materials used are diglycidyl ether of bisphenol A (DGBA) as the core material, triethylenetetramine (TETA) and an aminated polydimethylsiloxane (ADM), as curing agent and poly(urea-formaldehyde) (PUF) as microcapsule wall. Tests were done by dynamic and isothermal DSC of systems containing the resin and microencapsulated curing agent and also the resin with the free curing agent. The results showed the necessity of heating for the cure and the self-healing to be initiated.

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Section: Introductionmentioning

confidence: 99%

Differential Scanning Calorimetry study on curing kinetics of diglycidyl ether of bisphenol A with amine curing agents for self-healing systems

2017

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Microencapsulated amino‐functional polydimethylsiloxane as autonomous external self‐healing agent for epoxy systems

Weihermann

Meier

Pezzin

2019

J of Applied Polymer Sci

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shows the fracture surface of a self-healed DGEBA/mPDMS-a/mTETA (2.5 wt%, 80 C) system, indicating the breakage of microcapsules and the release of the core material. This suggests the formation of a hybrid interface from the reaction of PDMS-a with the epoxy matrix, causing an enhancement of the fracture toughness after the self-healing process. ARTICLES47569 Nonisothermal crystallization kinetic studies on melt processed poly(ethylene terephthalate)/polylactic acid blends containing graphene oxide and exfoliated graphite nanoplatelets 47636 Effects of the matrix crystallinity, dispersed phase, and processing type on the morphological, thermal, and mechanical properties of polylactide-based binary blends with poly[(butylene adipate)-co-terephthalate] and poly [(butylene succinate)-co-adipate]

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Mechanical behavior of epoxy systems using microencapsulated amino-functional siloxanes

Cited by 2 publications

References 16 publications

Differential Scanning Calorimetry study on curing kinetics of diglycidyl ether of bisphenol A with amine curing agents for self-healing systems

Differential Scanning Calorimetry study on curing kinetics of diglycidyl ether of bisphenol A with amine curing agents for self-healing systems

Microencapsulated amino‐functional polydimethylsiloxane as autonomous external self‐healing agent for epoxy systems

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