Synthesis and self-assembly of amphiphilic gradient copolymer via RAFT emulsifier-free emulsion polymerization

Chen, Yanjun; Luo, Wen; Wang, Yifeng; Sun, Chia‐Chung; Han, Mei; Zhang, Chaocan

doi:10.1016/j.jcis.2011.12.005

Cited by 52 publications

(29 citation statements)

References 22 publications

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“…[568] Gradient copolymers of TFEMA and AA were synthesized using an amphiphilic RAFT agent and starved feed addition of TFEMA. [438] Emulsion or dispersion polymerization was carried out in supercritical CO 2 of VAc with a PEO macro-RAFT agent (245), [526] of MMA with a PDMS macro-RAFT (148), [431] or of NVP with VAc/VPv [513] macro-RAFT agents agent as stabilizer. See also the section below on Microgels and Nanoparticles and Table 24 for examples of RAFT crosslinking polymerization.…”

Section: Raft Polymerization In Heterogeneous Mediamentioning

confidence: 99%

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Living Radical Polymerization by the RAFT Process – A Third Update

2012

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This paper provides a third update to the review of reversible deactivation radical polymerization (RDRP) achieved with thiocarbonylthio compounds (ZC(¼S)SR) by a mechanism of reversible addition-fragmentation chain transfer ( Chem. 2009Chem. , 62, 1402. This review cites over 700 publications that appeared during the period mid 2009 to early 2012 covering various aspects of RAFT polymerization which include reagent synthesis and properties, kinetics and mechanism of polymerization, novel polymer syntheses, and a diverse range of applications. This period has witnessed further significant developments, particularly in the areas of novel RAFT agents, techniques for end-group transformation, the production of micro/nanoparticles and modified surfaces, and biopolymer conjugates both for therapeutic and diagnostic applications.

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Section: Raft Polymerization In Heterogeneous Mediamentioning

confidence: 99%

“…A* [435] St [221] CMS [436] (BD) [437] (Ip) [437] AA [438] BA [221,439] 348 [311] (DMAEA) [221] (DADMAC) [440] AN/BD [312] (AN/BD) [441] St/MAH [435] (AA-b-TFEMA) [438] AA-b-St [437] (AA-b-St-b-BD) [437] (AA-b-St-b-Ip) [437] (AA-b-St-b-Ip) [437] (AA-b-BA-b-St-b-BD) [437] 156…”

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confidence: 99%

Living Radical Polymerization by the RAFT Process – A Third Update

2012

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“…It was reported that the neutralization of PAA‐ b ‐PS‐TTCA macro‐RAFT agent played a key role in the ab initio RAFT emulsion polymerization of St or butadiene . The influences of neutralization degree and method of PAA‐ b ‐PS‐TTCA macro‐RAFT on the controllability of polymerization and the characteristic of resulted latex were investigated in entries E2–E8 , as shown in Table .…”

Section: Resultsmentioning

confidence: 99%

Ab initio emulsion RAFT polymerization of vinylidene chloride mediated by amphiphilic macro‐RAFT agents

Yang

Bao

Pan

2014

J of Applied Polymer Sci

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An amphiphilic copolymer poly(acrylic acid)‐block‐poly(styrene) (PAA‐b‐PS) with a trithiocarbonate reactive group was used in the ab initio reversible addition‐fragmentation chain transfer (RAFT) emulsion polymerization of vinylidene chloride (VDC). The fast polymerization and high conversion were achieved. The parameters for a good control over the formation of well‐defined PAA‐b‐PS‐b‐PVDC amphiphilic block copolymers and self‐stabilized latexes were identified. To improve the emulsion stability and prevent the desorption of water‐soluble initiating radicals, the acid groups of PAA‐b‐PS were neutralized by NaOH at the later stage of polymerization. The PAA‐b‐PS‐b‐PVDC block copolymer with a high molar mass of 30 kg mol−1 and the stable latex with 30 wt % solid content was obtained. The kinetics of RAFT emulsion copolymerization of VDC in a living manner was first investigated. The as‐prepared PAA‐b‐PS‐b‐PVDC latex particles were further used as seeds in the emulsion polymerization of styrene, enabling the preparation of novel PAA‐b‐PS‐b‐PVDC‐b‐PS tetra‐block copolymers with a molar mass of 76 kg mol−1 and a relatively low molecular weight distribution of 1.6. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40391.

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“… In order to make a gradient copolymer with similar composition changes continuously from one end of the chain to the other, simultaneous initiation and uniform growth of all propagation chains are necessary in the polymerization process. The parallel growing of the chains in a CRP process cause a similar microstructure of all copolymer chains, so the CRP is an excellent method used to prepare gradient copolymers . There are two types of typical gradient copolymers prepared by CRP.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of gradient copolymers of butyl methacrylate and fluorinated acrylate via RAFT miniemulsion copolymerizations

Zhang

Wang³

et al. 2015

J of Applied Polymer Sci

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A series of gradient fluorinated copolymers with a broad variation of the monomer units in the polymer chain were synthesized via semibatch CPDB‐mediated RAFT miniemulsion polymerization technique. In the presence of RAFT agent 2‐cyanoprop‐2‐yl dithiobenzoate (CPDB), the copolymerization of BMA and FMA in miniemulsion exhibited typical features of a controlled molecular weights and narrow polydispersities. The macromolecular structure and thermal behavior of the synthesized fluorinated copolymers were investigated in detail. The DSC analyses show that the gradient copolymers showed a unique thermal behavior with broad range of transition temperature. It was also confirmed that the fluorinated gradient copolymer exhibited obvious surface segregation structure and ultra‐low surface energy between 16.8 and 20.3 mN/m. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 42936.

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Synthesis and self-assembly of amphiphilic gradient copolymer via RAFT emulsifier-free emulsion polymerization

Cited by 52 publications

References 22 publications

Living Radical Polymerization by the RAFT Process – A Third Update

Living Radical Polymerization by the RAFT Process – A Third Update

Ab initio emulsion RAFT polymerization of vinylidene chloride mediated by amphiphilic macro‐RAFT agents

Synthesis and properties of gradient copolymers of butyl methacrylate and fluorinated acrylate via RAFT miniemulsion copolymerizations

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