Synthesis and characterization of cellulose-b-polystyrene

Yagi, Shunsuke; Kasuya, Natsuki; Fukuda, Kiyoharu

doi:10.1038/pj.2009.342

Cited by 23 publications

(18 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that hydroxyl groups are not protected in the third and last method (adapted from ref. [67,69,70,73,74] ).…”

Section: ) Ch3onamentioning

confidence: 97%

“…Cellulose-based copolymers such as cellulose-b-PS were also evaluated as compatibilizers in immiscible cellulose/ PS blends. [70] This approach might probably be exemplified to other polysaccharide/synthetic polymer blends. A few studies reported on the use of amphiphilic polysaccharide block copolymers as surfactants in aqueous solutions.…”

Section: Self-assembly Of Polysaccharide Block Copolymers In Selectivmentioning

confidence: 99%

“…Amylose Oligo-methylene Enzymatic polymerization [39,40] Oligo-ethylene oxide Enzymatic polymerization [39,40] Poly(ethylene oxide) Enzymatic polymerization [39,40,44] Polystyrene Enzymatic polymerization [45,46] Cellulose Poly(g-benzyl L-glutamate) NCA polymerization [49] Poly(L-glutamic acid) NCA polymerization [49] Polystyrene ATRP [70] Cellulose triester Polychloroprene Radical polymerization [54] Polystyrene Radical polymerization [54,78] Reductive amination with cyanoborohydride ion at the reducing end of a polysaccharide chain (adapted from ref. [33] ).…”

Section: Polysaccharide Block Synthetic Block Synthetic Pathway Refermentioning

confidence: 99%

“…Authors reported DPs between 5 and 775 for PS blocks and overall polydispersities of block copolymers between 1.4 and 1.9, the polydispersity of the initial dextran block being 1.4. Recently, in a work on the synthesis and characterization of cellulose-b-PS copolymer, Yagi et al [70] studied more precisely the influence of the polysaccharide macroinitiator on the polymerization of styrene by ATRP. Cellulose with DPs in the range 20-250 were functionalized with 2-chloroacetamide at the reducing end by reductive amination (Scheme 5).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Polysaccharide‐Containing Block Copolymers: Synthesis, Properties and Applications of an Emerging Family of Glycoconjugates

Schatz

Lecommandoux

2010

Macromol. Rapid Commun.

157

123

View full text Add to dashboard Cite

While polysaccharide graft copolymers and glycopolymers have been widely studied and used in various applications, linear block copolymer structures combining a polysaccharide segment and a synthetic one have been less described. The limited availability of the polysaccharide reducing-end, the difficulty of finding a common solvent of both blocks and the need sometimes to protect the lateral hydroxyl groups of the polysaccharide chain may explain the relatively low number of studies on this copolymer family despite its potential interest. Polysaccharide block copolymers feature physicochemical properties not only close to those of synthetic block copolymers but also bring an added value such as the biodegradability, the biocompatibility or the bioactivity in some cases. This review aims at presenting the synthetic pathways towards such structures, from the basic polymerization techniques to the most recent ones including controlled/living polymerization mechanisms and also by emphasizing the chemical reactions used to functionalize the reducing-end of the polysaccharide block. The amphiphilic nature of most of the polysaccharide-based block copolymers reported so far gives rise to various self-assembly morphologies in the solid state or in selective solvents. In addition, the rigidity of the polysaccharide block is expected to influence the microphase separation of the block copolymer by increasing the thermodynamic incompatibility between dissimilar blocks. A special interest was drawn to the formation and the properties of polymer vesicles (polymersomes) in aqueous solutions. Polysaccharide block copolymers might represent a new class of biomaterials with potential applications in different fields such as the plastic industry, the detergency and also the pharmaceutics where the design of nanodevices carrying a native polysaccharide chain is of interest for therapy, vaccination and diagnosis purposes.

show abstract

“…Note that hydroxyl groups are not protected in the third and last method (adapted from ref. [67,69,70,73,74] ).…”

Section: ) Ch3onamentioning

confidence: 97%

Section: Self-assembly Of Polysaccharide Block Copolymers In Selectivmentioning

confidence: 99%

Section: Polysaccharide Block Synthetic Block Synthetic Pathway Refermentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Polysaccharide‐Containing Block Copolymers: Synthesis, Properties and Applications of an Emerging Family of Glycoconjugates

Schatz

Lecommandoux

2010

Macromol. Rapid Commun.

157

123

View full text Add to dashboard Cite

show abstract

“…27,28 Cellulose, which is the main constituent of plant cell walls and is abundant in nature, is known for its excellent biocompatibility and thermal and mechanical properties. [29][30][31][32] Similar to polypeptides and DNA, cellulose can form cholesteric LC phases. 33 Werbowyj and Gray 34 first reported the cholesteric phase of aqueous hydroxypropyl cellulose in 1976.…”

Section: Introductionmentioning

confidence: 99%

Effect of flexible spacer length on the mesophase structures of main-chain/side-chain liquid crystalline polymers based on ethyl cellulose

Xiao

et al. 2010

Polym J

View full text Add to dashboard Cite

Main-chain/side-chain liquid crystalline polymers (MCSCLCPs) based on ethyl cellulose (AzomEC, m¼2,4,6, where m is the length of the spacer between the main chain and mesogens) were successfully synthesized by N,N¢-dicylcohexylcarbodiimide (DCC) coupling. Molecular characterizations of the resultant polymers with different spacer lengths were performed by proton nuclear magnetic resonance, Fourier transform-infrared spectroscopy and gel permeation chromatography. The phase transitions and liquid crystalline (LC) behaviors of these polymers were investigated by differential scanning calorimetry, polarized optical microscopy and wide-angle X-ray diffraction. The results indicate that spacer length has a tremendous effect on the LC behavior of the polymer. The glass transition temperatures, phase transition temperatures and the corresponding enthalpy of transitions decreased as the flexible spacer length increased. The mesophase structures of polymers consisted of a large-scale ordered lamellar structure composed of the EC main chain and a relatively small-scale ordered structure formed by azobenzene side chains. All the polymers form a similar lamellar structure on a large scale; however, the small-scale ordered structure becomes relatively disordered, that is, from crystal (m¼2) to smectic B (m¼4) to smectic A (m¼6) at low temperatures.

show abstract