Adhesion/reliability/reworkability study on underfill material from free radical polymerization system and its hybrid composite with epoxy resin

2002 ◽  
Author(s):  
Lianhua Fan ◽  
C.P. Wong
Keyword(s):  
Free Radical ◽  
Epoxy Resin ◽  
Radical Polymerization ◽  
Hybrid Composite ◽  
Free Radical Polymerization ◽  
Polymerization System ◽  
Underfill Material

Preparation and flame retardancy of epoxy resin phosphoric acid modified poly-acrylate resin

2019 ◽  
Vol 48 (3) ◽  
pp. 197-201
Author(s):  
Buqin Xu ◽  
Guilong Xu ◽  
Hui Qiao ◽  
Yun Liang ◽  
Jin Yang ◽  
...  
Keyword(s):  
Free Radical ◽  
Phosphoric Acid ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Radical Polymerization ◽  
Flame Retardancy ◽  
Phosphorous Acid ◽  
Free Radical Polymerization ◽  
Flame Resistance ◽  
Content Type

Purpose The flammability of poly-acrylate (PA) resin is a major disadvantage in applications that require flame resistance. It has been reported that a flame-retardant PA resin could be prepared by covalent incorporate phosphorous containing monomer with vinyl group via free radical polymerization, and the prepared modified PA resin is expected to exhibit better flame resistance than those by an additive approach. However, the phosphorus-containing monomers reported previously are made from expensive or toxic materials, and the production procedure is tedious and under harsh reaction conditions, which are not feasible for industrial application. Therefore, the purpose of this paper is the preparation of flame-retardant PA resin modified by epoxy resin phosphorous acid (EPPA) and the study of its flame retardancy. Design/methodology/approach EPPA is first prepared by epoxy resin E-51 and phosphorous acid and then used to prepare phosphorous containing PA resin by free radical polymerization. The flame retardancy of the prepared EPPA-modified PA (EPPA-PA) resin is studied. Findings The results show that EPPA can graft onto the PA polymer chain by free radical polymerization, the flame retardancy of the EPPA-PA resin increases as the EPPA content increasing. The flame retardancy of EPPA-PA resin prepared reaches 27.8% and can pass the V-0 rating in the UL-94 test when EPPA content is 30.0%. SEM and EDS results indicate that phosphorous element in the EPPA-PA resin shows a condensed-phase flame retardant effect. Research limitations/implications The grafting degree of EPPA cannot be accurately tested. Practical implications It is expected that the large-scale production of this epoxy resin phosphoric acid modified PA resin will enable practical industrial applications. Originality/value This method for synthesis of epoxy resin phosphoric acid modified PA resin is newfrangled.

scholarly journals Self-strengthening hybrid dental adhesive via visible-light irradiation triple polymerization

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 52434-52447 ◽  
Author(s):  
Linyong Song ◽  
Qiang Ye ◽  
Xueping Ge ◽  
Anil Misra ◽  
Candan Tamerler ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Visible Light Irradiation ◽  
Cationic Polymerization ◽  
Sol Gel ◽  
Free Radical Polymerization ◽  
Light Irradiation ◽  
Dental Adhesive ◽  
Polymerization System

An integrated triple polymerization system containing free radical polymerization, cationic polymerization, and photoacid-induced sol–gel reaction was designed and successfully applied to develop dental adhesive capable of self-strengthening property in wet environments.

scholarly journals A Passivity Approach to the Stabilization of Free-Radical Polymerization Reactor

2018 ◽  
Vol 17 (2) ◽  
pp. 86
Author(s):  
Nguyen T. Sang ◽  
Hoang N. Ha ◽  
M.A. Hussain
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Tracking Error ◽  
Free Radical Polymerization ◽  
Multivariable Control ◽  
Reference Trajectory ◽  
Passive System ◽  
Supply Rate ◽  
Polymerization System ◽  
Dissipative Terms

This work proposes a tracking error passivity-based multivariable control viafeedback passivation for a class of free-radical polymerization systems in a continuouslystirred tank reactor (CSTR). Firstly, this system dynamics with high nonlinearity ispassivized by input coordinate transformations, the resulting passive system is then rewritten into a canonical form strongly related to the so-called Port Control Hamiltonianstructure. Actually, this representation allows to show the physical meanings of systemdynamics such as dissipative, non-dissipative terms and supply rate. From this, a feedbackcontroller based on tracking error is designed for the globally exponential stabilization atan arbitrarily chosen reference trajectory passing the desired equilibrium point. Thetheoretical developments are then illustrated for polystyrene polymerization system inthe CSTR. The numerical simulations show that the trajectories of styrene polymerizationsystem considered as an illustrative example of FRP system converges globallyexponentially to the imposed trajectories.

Non-isothermal Kinetics of Free Radical Polymerization of 2-Phenylethyl (Meth)acrylate

2018 ◽  
Vol 8 (3) ◽  
pp. 585-594
Author(s):  
Khdbudin Mulani ◽  
Ravindra Ghorpade ◽  
Surendra Ponrathnam ◽  
Nayaku Chavan ◽  
Kamini Donde
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Isothermal Kinetics ◽  
Kinetics Of
Sign in / Sign up

Export Citation Format

Share Document