pH- and temperature-sensitive statistical copolymers poly[2-(dimethylamino)ethyl methacrylate-stat -2-vinylpyridine] with Functional succinimidyl-ester chain ends synthesized by nitroxide-mediated polymerization

2012 ◽  
Vol 50 (20) ◽  
pp. 4341-4357 ◽  
Author(s):  
Chi Zhang ◽  
Milan Maric
Keyword(s):  
Temperature Sensitive ◽  
Ethyl Methacrylate ◽  
Succinimidyl Ester ◽  
Nitroxide Mediated Polymerization ◽  
Ester Chain

Nitroxide-Mediated Polymerization of 2-(Diethylamino)ethyl Methacrylate (DEAEMA) in Water

2014 ◽  
Vol 48 (1) ◽  
pp. 72-80 ◽  
Author(s):  
Ali Darabi ◽  
Abbas Rezaee Shirin-Abadi ◽  
Philip G. Jessop ◽  
Michael F. Cunningham
Keyword(s):  
Ethyl Methacrylate ◽  
Nitroxide Mediated Polymerization

Aqueous foams stabilized by temperature-sensitive hairy polymer particles

Soft Matter ◽  
2015 ◽  
Vol 11 (47) ◽  
pp. 9099-9106 ◽  
Author(s):  
S. Nakayama ◽  
S. Yusa ◽  
Y. Nakamura ◽  
S. Fujii
Keyword(s):  
Temperature Sensitive ◽  
Polymer Particles ◽  
Ethyl Methacrylate ◽  
Aqueous Foams

Polystyrene particles carrying poly[2–(diethylamino)ethyl methacrylate] hairs acted as temperature-sensitive particulate stabilizers for aqueous foams.

scholarly journals Ethylene Glycol Dicyclopentenyl (Meth)Acrylate Homo and Block Copolymers via Nitroxide Mediated Polymerization

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1547
Author(s):  
Alexandre Maupu ◽  
Yara Kanawati ◽  
Adrien Métafiot ◽  
Milan Maric
Keyword(s):  
Ethylene Glycol ◽  
Random Copolymer ◽  
Chain Extension ◽  
Butyl Methacrylate ◽  
Block Copolymerization ◽  
Molecular Weights ◽  
High Dispersity ◽  
High Fraction ◽  
Succinimidyl Ester ◽  
Nitroxide Mediated Polymerization

Nitroxide-mediated polymerization (NMP), (homo and block copolymerization with styrene (S) and butyl methacrylate/S) of ethylene glycol dicyclopentenyl ether (meth)acrylates (EGDEA and EGDEMA) was studied using BlocBuilder alkoxyamines. EGDEA homopolymerization was not well-controlled, independent of temperature (90–120 °C), or additional free nitroxide (0–10 mol%) used. Number average molecular weights (Mn) achieved for poly(EGDEA) were 4.0–9.5 kg mol−1 and were accompanied by high dispersity (Ð = Mw/Mn = 1.62–2.09). Re-initiation and chain extension of the poly(EGDEA) chains with styrene (S) indicated some block copolymer formation, but a high fraction of chains were terminated irreversibly. EGDEA-stat-S statistical copolymerizations with a low mol fraction S in initial feed, fS,0 = 0.05, were slightly better controlled compared to poly(EGDEA) homopolymerizations (Ð was reduced to 1.44 compared to 1.62 at similar conditions). EGDEMA, in contrast, was successfully polymerized using a small fraction of S (fS,0 ~ 10 mol%) to high conversion (72%) to form well-defined EGDEMA-rich random copolymer (molar composition = FEGDEMA = 0.87) of Mn = 14.3 kg mol−1 and Ð = 1.38. EGDEMA-rich compositions were also polymerized with the unimolecular succinimidyl ester form of BlocBuilder initiator, NHS-BlocBuilder with similar results, although Ðs were higher ~1.6. Chain extensions resulted in monomodal shifts to higher molecular weights, indicating good chain end fidelity.

Effect of 2-(dimethylamino) Ethyl Methacrylate on Nanostructure and Properties of pH and Temperature Sensitive Cellulose-Based Hydrogels

2020 ◽  
Vol 20 (3) ◽  
pp. 1799-1806
Author(s):  
Ping Jiang ◽  
Shaowei Chen ◽  
Linda Lv ◽  
Hongmin Ji ◽  
Gen Li ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Temperature Response ◽  
Light Transmittance ◽  
Dimensional Structure ◽  
Temperature Sensitive ◽  
The Novel ◽  
Ethyl Methacrylate ◽  
3D Network ◽  
Swelling Rate ◽  
Equilibrium Swelling Ratio

The novel double responsive cellulose/poly 2-(dimethylamino) ethyl methacrylate (PDMAEMA) hydrogel was synthesized via in situ free radical polymerization. The results from light transmittance measurements, scanning electron microscopy (SEM), mechanical property testing as well as swelling experiments demonstrated that DMAEMA played a significant impact on in hydrogel’s nanostructure.With increasing DMAEMA concentration, the transparency of hydrogels dropped and texture became softer. The incorporation of relatively hard cellulose and increase in crosslink density significantly enhanced 3D network structure of hydrogel. The tensile strength, compression and bending capabilities of the composite responsive hydrogels were fine with the DMAEMA in a certain range. When the DMAEMA concentration increased to 6 g/g(cellulose), the mechanical strength decreased noticeably. An increase in DMAEMA concentration resulted in a faster initial swelling rate and higher equilibrium swelling ratio. Further, three-dimensional structure and increase of DMAEMA concentration can also improve pH and temperature response sensitivity of hydrogels. Thus, the mechanical, swelling and responsive properties of hydrogel could be adjusted by the DMAEMA and polymerization modes.

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