Thermally Controlled Association in Aqueous Solutions of Diblock Copolymers of Poly[<i>N</i>-(2-hydroxypropyl)methacrylamide] and Poly(<i>N</i>-isopropylacrylamide)

Konak, Cestmfr; Oupický, David; Chytrý, Vladimír; Ulbrich, Karel; Helmstedt, Martin

doi:10.1021/ma000500c

Cited by 52 publications

(17 citation statements)

References 21 publications

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“…The majority of studies on NIPAM‐containing copolymers have been done for systems with hydrophobic13–15, 17, 18, 21, 31–40 or noncharged hydrophilic comonomers 15, 33, 41–43. Comparatively little work has been done on copolymers of NIPAM with monomers being weak33, 44, 45 or strong electrolytes 29, 46.…”

Section: Introductionmentioning

confidence: 99%

The Synthesis of (Z)‐Trisubstituted Allylic Alcohols by the Selective 1,4‐Hydrogenation of Dienol Esters: Improved Synthesis of (−)‐β‐Santalol

Fehr

Magpantay

Vuagnoux

et al. 2010

Chemistry A European J

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(E)-Trisubstituted allylic alcohols are commonly prepared from the corresponding (E)-enals, themselves readily accessible by a simple aldol condensation reaction. We demonstrate that these very same (E)-enals can be converted into (Z)-trisubstituted allylic acetates (and thus alcohols) by a ruthenium-catalyzed 1,4-hydrogenation of the corresponding dienol acetates. This simple solution to a long-lasting problem was applied to an industrially feasible synthesis of (-)-β-santalol.

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Section: Introductionmentioning

confidence: 99%

The Synthesis of (Z)‐Trisubstituted Allylic Alcohols by the Selective 1,4‐Hydrogenation of Dienol Esters: Improved Synthesis of (−)‐β‐Santalol

Fehr

Magpantay

Vuagnoux

et al. 2010

Chemistry A European J

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“…[11,12] Many studies have revealed that the composition, molecular architecture, molecular weight, and solution concentration influence the micellar properties. [13][14][15][16] Whereas the aggregation or self-assembly of micelles directly affects the gelation, as the concentration of the copolymer solution is up to a critical value during phase transition. [17] Armes et al reported that semibranched poly(methoxy-capped oligo(ethylene glycol) methacrylate)/poly(propylene oxide) (PPO) reversibly formed bigger and looser hydrated micelles at 20-60 8C as a result of the reduced micellar packing efficiency.…”

Section: Introductionmentioning

confidence: 99%

Effect of Block Order of ABA‐ and BAB‐Type NIPAAm/HEMA Triblock Copolymers on Thermoresponsive Behavior of Solutions

Zhao

Liu

Chen

et al. 2007

Macro Chemistry & Physics

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ABA and BAB triblock thermoresponsive copolymers (A = N‐isopropylacrylamide, B = 2‐hydroxyethyl methacrylate) have been synthesized by atom transfer radical polymerization (ATRP). BAB is shown to exhibit a higher transition temperature and a good solubility in water compared to ABA with the same composition and concentration. The differences are attributed to the distinct micellar structure, which is regulated by the block order of the copolymers. It is speculated that ABA and BAB copolymers separately form branch and flower micelles in water, which mainly influence the course of phase transition. The moduli of the ABA copolymer solution are higher than those of the BAB above gel point. In terms of hypothesized micelle models, it is proposed that the ‘branch’ micelles of the ABA solution preferably form more physical interconnections.

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“…Thermoresponsive polymeric micelles have attracted much attention from researchers in recent years 1–15. In particular, thermally controlled micellization of copolymers of poly(ethylene glycol) (PEG) and poly( N ‐isopropylacrylamide) (PNIPAM) has been well studied 1–14. Feijen and coworkers reported the synthesis of PEG‐ b ‐PNIPAM and its micellization behavior 1.…”

Section: Introductionmentioning

confidence: 99%

Adjustable temperature sensor with double thermoresponsiveness based on the aggregation property of binary diblock copolymers

Shi

Zhang

et al. 2006

J of Applied Polymer Sci

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This article presents a new and promising way to design a temperature sensor, which is based on the micellization or aggregation behavior of binary diblock copolymers of poly(ethylene glycol)-b-poly(N-isopropylacrylamide) (PEG-b-PNIPAM) and poly(ethylene glycol)-bpoly(4-vinylpyridine) (PEG-b-P(4-VP)). The temperature sensor presents both a lower critical response temperature (LCRT) and an upper critical response temperature (UCRT), where the thermoreversible aggregating of PEG-b-P(4-VP) and H 2 SO 4 is used to control the LCRT, and the thermoreversible micellization of PEG-b-PNIPAM is used to control the UCRT. Furthermore, the LCRT can be altered by changing the H 2 SO 4 concentration, and the UCRT can be adjusted by altering the PEG-b-PNIPAM concentration.

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Thermally Controlled Association in Aqueous Solutions of Diblock Copolymers of Poly[N-(2-hydroxypropyl)methacrylamide] and Poly(N-isopropylacrylamide)

Cited by 52 publications

References 21 publications

The Synthesis of (Z)‐Trisubstituted Allylic Alcohols by the Selective 1,4‐Hydrogenation of Dienol Esters: Improved Synthesis of (−)‐β‐Santalol

The Synthesis of (Z)‐Trisubstituted Allylic Alcohols by the Selective 1,4‐Hydrogenation of Dienol Esters: Improved Synthesis of (−)‐β‐Santalol

Effect of Block Order of ABA‐ and BAB‐Type NIPAAm/HEMA Triblock Copolymers on Thermoresponsive Behavior of Solutions

Adjustable temperature sensor with double thermoresponsiveness based on the aggregation property of binary diblock copolymers

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