Effect of Micro‐Additions of Carbon Nanotubes to Polymethylmethacrylate on Reduction in Polymerization Shrinkage

Abstract

The present study was done to prove polymerization shrinkage in PMMA resins with micro-additions of carbon nanotubes. The results clearly show reduction in polymerization shrinkage when carbon nanotubes are incorporated into the PMMA resin.

Comparison of the flexural strength of polymethyl methacrylate resin reinforced with multiwalled carbon nanotubes and processed by conventional water bath technique and microwave polymerization

“…In the literature, it has already been proven that addition of various quantities of CNTs to acrylic resin improves various properties such as flexural strength, impact strength, and polymerization shrinkage. [ 16 36 37 ] There is no documented evidence on evaluation of flexural strength of heat cure denture base resin reinforced with MWCNTs processed through microwave energy. Hence, the present study was done to compare the effect of reinforcement of MWCNT's on flexural strength of heat cure denture base resin processed by conventional water bath technique and microwave technique.…”

“…Hence, the augmentation of nanotubes in acrylic resins will improve the mechanical properties of the acrylic, eliminating the need for metal reinforcement in stress-bearing areas. [ 16 ] The effect of CNTs on living cells is still being studied, and till now, no known adverse effects have been reported. [ 17 ]…”

Prosthodontic Applications of Polymethyl Methacrylate (PMMA): An Update

“…Although there are a number of concerns associated with using PMMA, such as the fracture of dentures due to water sorption and poor impact and flexural strength, the ongoing research has introduced a variety of modifications to overcome and further improve its properties (such as its conductivity, water sorption, solubility, impact and flexural strengths). For example, several studies reported the improvement of PMMA materials while reinforced using a variety of fibers [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], nanoparticles [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ], and nanotubes [ 38 , 39 , 40 , 41 , 42 ]. Similarly, PMMA-based biocomposites with the addition of epoxy resins, polyamide, or butadiene styrene have been reported to improve the impact strength of PMMA [ 43 ].…”

Estudo comparativo da dispersão de nanotubos de carbono e sua adição em um cimento endodôntico à base de óxido de zinco e eugenol

“…Resultado diferente foi obtido em pesquisa que fez a adição de NTC em resina acrílica à base de polimetilmetacrilato quando da avaliação da contração de polimerização. Os autores relataram redução da contração de polimerização quando realizada adições de NTC em diferentes proporções, sendo a proporção de 0,5% a que obteve o melhor resultado 8 .…”

“…Estes cilindros de moléculas de carbono possuem propriedades incomum e que são de altíssimo valor no campo da nanotecnologia, eletrônica, óptica e outros campos tecnológicos da ciência dos materiais. Os nanotubos de carbono têm sido considerados como potenciais candidatos para atuarem como agentes de reforço em polímeros possibilitando inúmeras melhorias nas estruturas dos materiais 8 .…”