A method for determining the optimum peroxide‐to‐amine ratio for self‐curing resins

Bowen, R.L.; Argentar, H.

doi:10.1002/app.1973.070170720

Cited by 29 publications

(14 citation statements)

References 17 publications

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“…Because the molecule is ion exchanged onto the clay surface, the amount of acceleration within the gallery is dependent upon the charge density of the clay and the amount of clay added to the system. The optimal ratio of BPO to amine was determined to be approximately 2:1 wt% by the method of Bowen et al, by reaction of MMA with free RCS and DMA [29]. As deliberate variations in the amount of RCS added to the system were necessary, due to the addition of different types and/or amounts of RCSmodified clay, the optimal ratio of 2:1 wt% was kept constant throughout all the experiments by varying the concentration of BPO added.…”

Section: The Architecture Of Rcsmentioning

confidence: 99%

The effects of intragallery polymerization on the structure of PMMA–clay nanocomposites

Stadtmueller

Ratinac

Ringer

2005

Polymer

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Section: The Architecture Of Rcsmentioning

confidence: 99%

The effects of intragallery polymerization on the structure of PMMA–clay nanocomposites

Stadtmueller

Ratinac

Ringer

2005

Polymer

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“…With low amine concentration, nearly colorless restorations, having good color stability, were obtained. [14] Also, recent studies on experimental dental acrylic composites showed that a much larger molar excess of BPO is required (about 6.5) in order to obtain the fastest cure. [9,11] Fritsch reported that bone cements prepared with DMPOH, showed increased static mechanical properties and fatigue strength, compared with those prepared with DMT.…”

Section: Introductionmentioning

confidence: 99%

Study of the Effect of Two Bpo/Amine Initiation Systems on the Free-Radical Polymerization of Mma Used in Dental Resins and Bone Cements

Achilias

Sideridou

2002

Journal of Macromolecular Science, Part A

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The kinetics of the free radical bulk polymerization of methyl methacrylate (MMA) was studied by DSC, using the benzoyl peroxide (BPO)=amine initiation system. N,N dimethyl-4-aminophenethyl alcohol (DMPOH), which is a newly synthesized and used amine in the preparation of acrylic dental resins and bone cements was examined, and the results compared to the most commonly used in these applications amine, the N,N dimethyl-p-toluidine (DMT). For both amines, the effect of the molar ratio of BPO=amine and of the reaction temperature, on the polymerization kinetics was investigated. The prepared polymers were characterized by determination of the average molecular weights ( M n and M w ) and molecular weights distribution ( M w = M n ) using Gel Permeation Chromatography. DMPOH was found to lead in slightly higher polymerization rates, lower gel times and lower molecular weights than DMT. The values of these parameters for both amines were influenced by the molar ratio of BPO to amine, when the product of the concentrations of these was kept constant. The highest polymerization rate occurred in the lowest gel time, resulting in polymers with the lowest molecular weight, and was observed when a molar ratio of about 1.5 BPO=amine was used. However, the final monomer conversion was found to be independent of the molar ratio and amine used. The activation energy of polymerization was found to be 51.8 kJ=mol K for BPO=DMPOH and 47.1 kJ=mol K for BPO=DMT.

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“…The concept of adding MMA monomer to Ortho-plast® resin is to extend working time by diluting accelerator (e.g., DMPT). Only the optimum molar ratio of BPO to amine provides polymerization with the minimum time [8]. This specific ratio more or less leads to reduced polymerization rate.…”

Section: Discussionmentioning

confidence: 99%

The modification of acrylic denture base resin as materials for artificial teeth: Effect of hydroquinone and methyl methacrylate monomer

Banjong¹,

Sankham²,

Duangnga³

et al. 2020

ScienceAsia

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The purpose of this project is to modify denture base resin for use as artificial teeth material. Generally, resin for denture base will harden within a few minutes but the working period for artificial teeth shaping is about 30 min. Adding methyl methacrylate (MMA) monomer to dilute accelerator and adding hydroquinone (HQ) as an inhibitor are considered in order to extend the solidifying time of denture base resin. The ratios of denture base resin/MMA in this study were 3:1, 2:2 and 1:3 v/v and the concentration of HQ was varied from 0.01-0.05 wt%. The results indicated that both HQ and MMA prolonged solidification time of denture base resin and HQ was more effective in increasing working time than MMA. However, the introduction of HQ and MMA decreased mechanical properties of the resin including flexural strength, flexural modulus and hardness, so further modifications such as addition of fillers are required.

show abstract

A method for determining the optimum peroxide‐to‐amine ratio for self‐curing resins

Cited by 29 publications

References 17 publications

The effects of intragallery polymerization on the structure of PMMA–clay nanocomposites

The effects of intragallery polymerization on the structure of PMMA–clay nanocomposites

Study of the Effect of Two Bpo/Amine Initiation Systems on the Free-Radical Polymerization of Mma Used in Dental Resins and Bone Cements

The modification of acrylic denture base resin as materials for artificial teeth: Effect of hydroquinone and methyl methacrylate monomer

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