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Semibatch Aqueous-Solution Polymerization of Acrylic Acid: Simultaneous Control of Molar Masses and Reaction Temperature
(Wiley Vch Verlag, 2011-06)
The semibatch polymerization of non-ionized acrylic acid (AA) was investigated with the aim of producing poly(acrylic acid) (PAA) of controlled molar masses, at complete AA conversion, and under safe conditions. The proposed ...
A Safety Strategy for Producing Poly(Acrylic Acid) of Low Molar Mass
(Wiley VCH Verlag, 2017-01)
The synthesis of poly(acrylic acid) (PAA) of low molar mass under safe conditions is difficult due to the high polymerization rate of acrylic acid (AA) and the fast heat generation. The aqueoussolution ?semibatch? ...
Síntesis controlada de poli(ácido acrílico) de baja masa molar en condiciones de operación seguras
(2012-03-02)
En esta tesis se investiga la polimerización “semibatch” en solución acuosa del ácido acrílico en condiciones cercanas a la inanición del monómero (a muy baja concentración del ácido acrílico durante toda la reacción), con ...
Effect of irradiation on the molar mass of chitosan from crab shells of Charybdis hellerii
(International Union of Pure and Applied Chemistry, 2020)
Scale Inhibitor and Dispersant Based on Poly(Acrylic Acid) Obtained by Redox‐Initiated Polymerization
(Wiley VCH Verlag, 2019-05)
Low molar mass poly(acrylic acid) (PAA) is generally obtained by free radical polymerization of acrylic acid (AA) in aqueous solution, using thermal initiators and some chain transfer agent. However, under such conditions ...
Controlled rheology of polypropylene: Modeling of molecular weight distributions
(John Wiley & Sons Inc, 2003-05)
A mathematical model for the controlled degradation of polypropylene is presented in this article. A previous model of this process was extended to predict the whole molecular weight distribution of the modified resin. ...
Controlled synthesis of poly(dimethylsiloxane) homopolymers using high-vacuum anionic polymerization techniques
(John Wiley & Sons Inc, 2009-09-05)
The controlled synthesis of poly(dimethylsiloxane) homopolymers (PDMS) using hexamethyl(cyclotrisiloxane) monomer (D 3 ), a mixture of ciclohexane/tetrahydrofuran 50/50 v/v and sec-Bu - Li + as initiator was studied using ...
Comparison of anterior retraction and anchorage control between en masse retraction and two-step retraction: A randomized prospective clinical trial
(E H Angle Education Research Foundation, Inc, 2019-03-01)
Objectives: The purpose of this two-arm parallel trial was to compare en masse (ER) and two-step retraction (TSR) during space closure. Materials and Methods: Forty-eight adult patients with bimaxillary protrusion who were ...
Assessment of the bioavailability of an antibiotic prophylactic protocol in patients undergoing third molar surgery
(Facultad de Odontología, 2019)
The aim of this prospective study was to determine the antibiotic bioavailability of a prophylactic protocol in patients undergoing third molar surgery. Samples from 25 patients were analysed (average age 21 +/- 3.89 years, ...