English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Cellulose was premodified by short-chain fatty acid anhydrides, such as acetic anhydride (CA), propionic anhydride (CP), and butyric anhydride (CB), followed by grafting of polyoxyethylene (2) hexadecyl ether (E₂C 16 ) using toluene-2,4-diisocyanate as a coupling agent. The feeding molar ratio of E₂C 16 and the anhydroglucose unit (AGU) was fixed at 4:1, and then a series of CA-g-E₂C 16 , CP-g-E₂C 16 , and CB-g-E₂C 16 copolymers were successfully prepared. The structures and properties of the copolymers were characterized using FTIR (fourier transform infrared spectra), ¹H-NMR (Proton nuclear magnetic resonance), DSC (Differential scanning calorimeter), POM (polarized light microscopy), TGA (thermogravimetric analysis) and WAXD (wide-angle X-ray diffraction). It was shown that with the anhydride/AGU ratio increasing, the degree of substitution (DS) value of E₂C 16 showed a trend of up first and then down. With the carbon chain length increasing, the DS value of E₂C 16 continuously increases. The phase transition temperature and thermal enthalpy of the copolymers increased with an increasing DS value of E₂C 16 . When the ratio of CB/AGU was 1.5:1, the DS of E₂C 16 was up to the maximum value of 1.02, and the corresponding melting enthalpy and crystallization enthalpy were 32 J/g and 30 J/g, respectively. The copolymers showed solid⁻solid phase change behavior. The heat resistant temperature of cellulose-based solid⁻solid phase change materials was always higher than 270 °C. After the grafting reaction, the crystallinity of E₂C 16 decreased, while the crystal type was still hexagonal.

Effects of Fatty Acid Anhydride on the Structure and Thermal Properties of Cellulose-g-Polyoxyethylene (2) Hexadecyl Ether