Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Fuente, Jos L. de la; Fernández-Sanz, Marina; Madruga, Enrique López

doi:10.1002/1521-3927(20010901)22:13<1046::aid-marc1046>3.0.co;2-q

Cited by 15 publications

(7 citation statements)

References 12 publications

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“…In addition, the T g s of mono and difunctional macroinitiators and PHEMA‐Cl homopolymer were measured, being −50.2, −49.9 and 58.9 °C, respectively. These values are in agreement with those reported in the literature with exception of that found for PHEMA that exhibits a higher glass transition possible due to its higher molecular weight 60, 72–74…”

Section: Resultssupporting

confidence: 92%

Glycopolymers obtained by chemical modification of well‐defined block copolymers

Muñoz‐Bonilla

León

Cerrada

et al. 2012

J. Polym. Sci. A Polym. Chem.

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Well‐defined di and triblock copolymers based on 2‐hydroxyethyl methacrylate, HEMA, and n‐butyl acrylate, BA, have been synthesized by atom transfer radical polymerization, ATRP. Two copolymers have been selected to prepare glycopolymers containing D‐(+)‐glucosamine or N‐(4‐aminobutyl)‐D‐gluconamide, NABG, by chemical modification of HEMA units. The chemical modification occurs by activation of the hydroxyl groups of the HEMA units with highly reactive p‐nitrophenyl carbonate groups. The block copolymers structure and self‐assembly have been comprehensively studied in solid state and in solution by differential scanning calorimetry, X‐ray diffraction, atomic force microscopy and dynamic light scattering. The resulting glycopolymers obtained upon chemical modification turned out to be water soluble. Therefore, their carbohydrate‐lectin interactions of have been analyzed by turbidimetry measurements. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012

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Section: Resultssupporting

confidence: 92%

Glycopolymers obtained by chemical modification of well‐defined block copolymers

Muñoz‐Bonilla

León

Cerrada

et al. 2012

J. Polym. Sci. A Polym. Chem.

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“…7). Previously reported studies of the synthesis of PGMA by FRP indicated its T g in the range 74–78°C,8, 9 whereas PMMA homopolymer exhibited T g 's at 127°C (FRP)31 and 109–104°C (ATRP) 32, 33…”

Section: Resultsmentioning

confidence: 97%

Atom transfer radical copolymerization of glycidyl methacrylate and methyl methacrylate

Neugebauer¹,

Bury²,

Wlazło³

2011

J of Applied Polymer Sci

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Glycidyl methacrylate (GMA) and methyl methacrylate (MMA) copolymers were synthesized by atom transfer radical polymerization (ATRP). The effect of different molar fractions of GMA, ranging from 0.28 to 1.0, on the polymer polydispersity index (weight-average molecular weight/number-average molecular weight) as the indicator of a controlled process was investigated at 70 C, with ethyl 2-bromoisobutyrate as an initiator and 4,4 0 -dinonyl-2,2 0 -bipyridyne (dNbpy)/CuBr as a catalyst system in anisole. The monomer reactivity ratios (r values) were obtained by the application of the conventional linearization Fineman-Ross method (r GMA ¼ 1.24 6 0.02 and r MMA ¼ 0.85 6 0.03) and by the Mayo-Lewis method (r GMA ¼ 1.19 6 0.04 and r MMA ¼ 0.86 6 0.03). The molecular weights and polydispersities of the copolymers exhibited a linear increase with GMA content. The copolymer compositions were determined by 1 H-NMR and showed a domination of syndiotactic structures. The glass-transition temperatures (T g ) of the copolymers analyzed by differential scanning calorimetry (DSC) decreased in the range 105-65 C with increasing GMA units.

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“…For this result, it is explained by the presence of two factors, which can simultaneously affect T g . The first one is the continuous increase in molecular weight with conversion would induce an increase in T g of copolymers until reaching a plateau at high values where T g becomes invariable, which can be rationalized by the reduction in free volume as the number of chain ends decreases with increasing molar mass; the second one is a composition variation causing a change in T g 65, 66. In this case, both the Mns obtained by the normal mode and the inverse mode increase during the reaction process, which give rise to the increase of T g .…”

Section: Resultsmentioning

confidence: 99%

Synthesis of gradient copolymers with simultaneously tailor‐made chain composition distribution and glass transition temperature by semibatch ATRP: From modeling to application

Zhou

Luo

2012

J. Polym. Sci. A Polym. Chem.

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Recent studies have demonstrated that gradient copolymers exhibit unique thermal properties. Although these properties can be determined by copolymer composition, other factors such as chain and sequence lengths and their distributions can also influence them. Accordingly, the synthesis of gradient copolymers requires simultaneously tailor-made chain structure and thermal properties. In this work, we carried out a systematic study on the preparation of poly(methyl methacrylate-grad-2-hydroxyethyl methacrylate) [poly(MMA-grad-HEMA)] with synchronously tailor-made chain composition distribution and glass transition temperature (Tg) through semibatch atom transfer radical polymerization. First, a comprehensive model for simultaneously predicting gradient copolymer microstructure and Tg was presented using the concept of pseudo-kinetic rate coefficients and Johnston equation. The model was validated by comparing simulation results with the classical reference data. Furthermore, the model was used to guide the experimental synthesis of the poly(MMA-grad-HEMA) gradient copolymers potentially as excellent damping material. The thermal properties of these gradient copolymer samples were evaluated. (c) 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012National Natural Science Foundation of China [20406016, 21076171

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Glass Transition Temperatures of Poly[(methyl methacrylate)-co-(butyl acrylate)]s Synthesized by Atom-Transfer Radical Polymerization

Cited by 15 publications

References 12 publications

Glycopolymers obtained by chemical modification of well‐defined block copolymers

Glycopolymers obtained by chemical modification of well‐defined block copolymers

Atom transfer radical copolymerization of glycidyl methacrylate and methyl methacrylate

Synthesis of gradient copolymers with simultaneously tailor‐made chain composition distribution and glass transition temperature by semibatch ATRP: From modeling to application

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