نتایج جستجو برای: situ polymerization method using a resin matrix based on bisphenol

تعداد نتایج: 16878245  

Journal: :Journal of the Royal Society, Interface 2007
S A Hayes W Zhang M Branthwaite F R Jones

Self-healing resin systems have been discussed for over a decade and four different technologies had been proposed. However, little work on their application as composite matrices has been published although this was one of the stated aims of the earliest work in the field. This paper reports on the optimization of a solid-state self-healing resin system and its subsequent use as a matrix for h...

2008
Ying-Nan Chan Tzong-Yuan Juang Yi-Lin Liao Shenghong A. Dai Jiang-Jen Lin

An anionic clay, magnesium–aluminum layered double hydroxide (Mg2Al–NO3–LDH), was prepared by a co-precipitation method and intercalated with poly(oxypropylene)–amindocarboxylic acid (POP– amido acid). Depending on the POP-intercalating agents with molecular weight at 2000 or 400 g/mol, the intercalated LDHs were analyzed to have d spacing of 6.8 or 2.7 nm and organic incorporation of 80 and 55...

Journal: :journal of dental research, dental clinics, dental prospects 0
seyd mostafa mousavinasab ian meyers

background and aims. the aim of the present study was to compare the efficacy of quartz tungsten halogen (qth) and light emitting diode (led) curing lights on polymerization of resin composite. materials and methods. a hybrid resin composite was used to prepare samples which were cured using two qth and ten led light curing sources. twelve groups, each containing ten samples, were prepared usin...

پایان نامه :0 1374

the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...

2015
Ye Ji Noh Han-Ik Joh Jaesang Yu Soon Hyoun Hwang Sungho Lee Cheol Ho Lee Seong Yun Kim Jae Ryoun Youn

The drying process of graphene-polymer composites fabricated by solution-processing for excellent dispersion is time consuming and suffers from a restacking problem. Here, we have developed an innovative method to fabricate polymer composites with well dispersed graphene particles in the matrix resin by using solvent free powder mixing and in-situ polymerization of a low viscosity oligomer resi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده ادبیات و علوم انسانی 1392

in new management approaches, in the organizations with inflexible structure, existing of red tapes and interruptions caused by limitations and also non-compliance with environmental changes, create demotivation among staff. with regard to the influence of job motivational potential and its relationship to the type of organizational structure( enabling and dissuasive), the goal of this research...

Journal: :Journal of dental research 2016
E A Suiter L E Watson D Tantbirojn J S B Lou A Versluis

The purpose of this study was to investigate the relationship between hygroscopic expansion and polymerization shrinkage for compensation of polymerization shrinkage stresses in a restored tooth. One resin-modified glass-ionomer (RMGI) (Ketac Nano, 3M ESPE), 2 compomers (Dyract, Dentsply; Compoglass, Ivoclar), and a universal resin-based composite (Esthet•X HD, Dentsply) were tested. Volumetric...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پزشکی 1389

introduction: diabetes mellitus is an growing national and international public health concern. the number of people affected by diabetes in world by 2030 will be 69% in developing countries. regular physical activity plays a key role in the management of type 2 diabetes melitus, particularly glycemic control. it has been recommended that peoples with type 2 diabetes participate in moderate-int...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...

Journal: :Dental materials journal 2004
Takahiro Ono Seiichi Kita Takashi Nokubi

The purpose of this study was to confirm the dimensional accuracy of a newly developed injection pressing method for resin polymerization by making use of the internal electric resistance of resin to determine the optimal timing for resin injection. A new injection pressing polymerization pot with a built-in system to measure the internal electric resistance of resin was used for resin polymeri...

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