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Cover Picture. Macromol. Symp. 283-284. New Trends in Polymer Science.

September 2009

September 2009

Authors:

A. Licea-Claverı́e

Instituto Tecnológico de Tijuana

Jesús Álvarez-Sánchez

Instituto Tecnológico de Sonora, Cd. Obregón , Sonora, México

Lorenzo Antonio Picos Corrales

Universidad Autónoma de Sinaloa

Tijuana Institute of Technology

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The cover, taken from the article of A. Licea‐Claveríe et al., p. 56, shows a scheme for the preparation of core crosslinked stars polymers via controlled radical polymerisation (RAFT‐methodology). https://doi.org/10.1002/masy.200990023.

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October 2019

A. Licea-Claverı́e · Jesús Álvarez-Sánchez · Lorenzo Antonio Picos Corrales · Claudia Obeso · Curtis W. Frank

ResearchGate has not been able to resolve any citations for this publication.

ResearchGate has not been able to resolve any references for this publication.

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Structural Ordering in Star Polymer Solutions

May 1997 · Polymer-Plastics Technology and Engineering

Polystyrene stars were prepared by crosslinking polystyryl monoanions with divinylbenzene. The dilute solution properties of this star (arm number f = 20) were characterized by static light scattering. The structural ordering of such stars was investigated through small-angle x-ray scattering. This star polymer formed a body-centered cubic (bcc) structure near the overlap concentration (C). This ... [Show full abstract] structure changed to a mixed lattice of bcc and face-centered cubic (fcc) structures at higher polymer concentration.

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Macromol. Symp. 283–284

September 2009 · Macromolecular Symposia

Cover: The inaugural US‐Mexico Symposium on Advances in Polymer Science, MACROMEX 2008, took place in Los Cabos, Mexico. This first bi‐national conference was the result of a joint effort of the Mexican Polymer Society and the Polymer Chemistry Division of the American Chemical Society. The cover is taken from the article of A. Licea‐Claveríe et al., p. 56, and shows the synthetic scheme for the ... [Show full abstract] preparation of polymeric stars with polyNIPAAm arms and crosslinked core by use of the RAFT‐methodology.

Article

The Use of the RAFT‐Technique for the Preparation of Temperature/pH Sensitive Polymers in Different...

September 2009 · Macromolecular Symposia

In this contribution we report the use of the RAFT-technique for the preparation of three types of responsive polymeric materials with a high potential of application in the biomedical field: 1.-Diblock copolymers with reversible self-assembly capacity as a function of pH based on N,N′-diethylaminoethyl methacrylate (DEAEM) and 2-methacryloyloxy benzoic acid (MAOB); 2.-Diblock copolymers with ... [Show full abstract] reversible self-assembly capacity as a function of temperature, based N-isopropylacrylamide (NIPAAm) and n-hexyl acrylate (HA); and 3.-Polymeric stars with random number of arms consisting either in NIPAAm-arms or copolymeric NIPAAm-arms and hydrophobic core.

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October 2019

Article

Full-text available

Effect of crosslinkers on size and temperature sensitivity of poly(N-isopropylacrylamide) microgels

February 2012 · Polymer Bulletin

In this work, we study the effect of crosslinkers on the size and swelling properties of temperature sensitive N-isopropylacrylamide (NIPAAm) microgels produced by dispersion polymerization. The crosslinkers studied were N,N′-methylenebisacrylamide (MBA), ethylene glycol dimethacrylate (EGDMA) an 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5] undecane (DVA). The type of crosslinker had a major impact ... [Show full abstract] on the size and swelling behavior, although the proportion of crosslinker used in each case was low (maximum 5 mol%). The effect can be related to the hydrophilic/hydrophobic characteristics of the crosslinkers. DVA produces smaller hydrogels with reduced swelling ratio, MBA produces bigger microgels with higher swelling ratio, while EGDMA results in an intermediate behavior. With increasing amount of crosslinker used in the synthesis, the extent of the swelling ratio decreases for DVA and EGDMA crosslinked microgels, while increases for MBA crosslinked microgels. There is also a slight effect on the critical transition temperature (T c) of the microgels from 30 °C (DVA) to 34 °C (MBA) as observed in copolymers of NIPAAm with hydrophilic or hydrophobic comonomers.

Last Updated: 02 Jul 2024