scholarly journals Highly-branched poly(N-isopropyl acrylamide)s with core–shell morphology below the lower critical solution temperature

RSC Advances ◽  
2014 ◽  
Vol 4 (92) ◽  
pp. 50932-50937 ◽  
Author(s):  
Richard Plenderleith ◽  
Thomas Swift ◽  
Stephen Rimmer
Keyword(s):  
Lower Critical Solution Temperature ◽  
Shell Morphology ◽  
Solution Temperature ◽  
Core Shell ◽  
Critical Solution Temperature ◽  
Degree Of Branching ◽  
Isopropyl Acrylamide ◽  
Pass Through

Dilute poly(N-isopropyl acrylamide)s pass through a coil-to-globule transitions. Some hyperbranched compositions have biphasic core–shell morphologies with globular cores and open coil shells dependent on the degree of branching.

scholarly journals Upper or lower critical solution temperature, or both? Studies on cationic copolymers of N-isopropylacrylamide

2015 ◽  
Vol 6 (16) ◽  
pp. 3074-3082 ◽  
Author(s):  
Erno Karjalainen ◽  
Vladimir Aseyev ◽  
Heikki Tenhu
Keyword(s):  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Trimethylammonium Chloride ◽  
Solution Properties ◽  
Critical Solution Temperature ◽  
Isopropyl Acrylamide ◽  
Cationic Copolymers

The solution properties of statistical copolymers of N-isopropyl acrylamide (NIPAm) and cationic (3-acrylamidopropyl) trimethylammonium chloride (AMPTMA) have been studied.

Synthesis and Characterization of Core-Shell Thermo-Responsive Microgels with Linear Transition Behavior

2015 ◽  
Vol 671 ◽  
pp. 261-266
Author(s):  
Shu Lin Guan ◽  
Na Fan ◽  
Qi Zhong ◽  
Ji Ping Wang
Keyword(s):  
Particle Size ◽  
Solution Temperature ◽  
Core Shell ◽  
Critical Solution Temperature ◽  
The Core ◽  
Transition Behavior ◽  
Isopropyl Acrylamide ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

Thermo-responsive microgels with core-shell structure were prepared by free radical emulsion polymerization. The core of microgels was consisted of poly (N-isopropyl acrylamide) (PNIPAM), while the shell was consisted of poly (ethylene glycol) methyl ether methacrylate (POEGMA300). In order to compare the transition behavior of the core-shell microgels with the microgels consisted of one thermo-responsive microgel, PNIPAM and POEGMA300 microgels were prepared. PNIPAM exhibits a lower critical solution temperature (LCST) of 32 °C, and the LCST of POEGMA300 is approximately 63 °C. The thermo-responsive microgel behavior was measured by dynamic light scattering (DLS). It is observed that both of PNIPAM and POEGMA300 microgels show a thermo-responsive ability. The particle size significantly drops when the temperature passes LCST. Moreover the particle size of the thermo-responsive microgels with core (PNIPAM)-shell (POEGMA300) structure shows a linear transition behavior when the temperature is between 50 °C and 70 °C.

Lower critical solution temperature sensitivity to structural changes in poly( N ‐isopropyl acrylamide) homopolymers

2019 ◽  
Vol 57 (20) ◽  
pp. 1386-1393 ◽  
Author(s):  
Alberto García‐Peñas ◽  
Yu Wang ◽  
Alexandra Muñoz‐Bonilla ◽  
Marta Fernández‐García ◽  
Florian J. Stadler
Keyword(s):  
Temperature Sensitivity ◽  
Lower Critical Solution Temperature ◽  
Structural Changes ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
Isopropyl Acrylamide

A polyelectrolyte-containing copolymer with a gas-switchable lower critical solution temperature-type phase transition

2019 ◽  
Vol 10 (2) ◽  
pp. 260-266 ◽  
Author(s):  
Jin-Jin Li ◽  
Yin-Ning Zhou ◽  
Zheng-Hong Luo ◽  
Shiping Zhu
Keyword(s):  
Phase Transition ◽  
Cloud Point ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
Type Phase

A polyelectrolyte-containing copolymer with a CO2/N2-switchable cloud point, resulting from the gas-induced alternation of hydrophilicity, was prepared.

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