Isothermal Crystallization Kinetics of Poly (3-hydroxybutyrate/ Poly(ethylene-co-vinyl acetate) Blends Enhanced by NH<sub>4</sub>Cl as a Nucleating Agent

El-Taweel, S. H.; Al-Ahmadi, Arwa

doi:10.1080/00222348.2019.1593620

Cited by 4 publications

(1 citation statement)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absolute value of ΔEa for CNF and CNF–JQ/MC nylon is higher than that of pure MC nylon, indicating that the CNF and CNF–JQ in composites impede the movement of molecular chains to increase the nucleation energy barrier. In the composites, the heterogeneous nucleation is higher than the chain entanglement as the filler content increases and therefore the ΔEa value decreases [ 45 ].…”

Section: Resultsmentioning

confidence: 99%

Crystallization Kinetics of Modified Nanocellulose/Monomer Casting Nylon Composites

Guo

Tang

et al. 2023

Polymers

View full text Add to dashboard Cite

Polyisocyanate and caprolactone were used to chemically functionalize nanocellulose (CNF). Composites of CNF, caprolactone-modified nanocellulose (CNF–CL) and polyisocyanate-modified nanocellulose (CNF–JQ)/MC nylon were fabricated by anionic ring-opening polymerization. The effects of the crystal structure, crystal morphology and crystallization process of MC nylon composites have been characterized by wide-angle X-ray diffraction (WAXD), polarized optical microscopy(POM) and differential scanning calorimetry (DSC). Isothermal crystallization kinetics were analyzed using the Avrami equation, and the crystallization rate, half-time, and Avrami exponent were calculated. The results show that the nucleation effects of CNF–JQ/MC nylon composites is increased with the CNF–JQ increase, and it is best compared with MC nylon, CNF/MC nylon and CNF–CL/MC nylon composites, so CNF–JQ can play the role of effective nucleating agent in MC nylon. We also discussed the non-isothermal crystallization of the composites. Analysis of the Jeziorny and Mo model demonstrates that the Zc values of CNF, CNF–CL, CNF–JQ/MC nylon composites increase, and the F(T) values decrease in order. This indicates that CNF–JQ can better promote the crystallization rate of non-isothermal crystallization of MC nylon. The results of this work demonstrate that CNF–JQ can be an effective nucleation agent and increase the crystallization rate of MC nylon compared with CNF–CL. The activation energy of the composites was studied using the kissing method, and the results showed that CNF–CL decreased the activation energy of MC nylon, and CNF and CNF–JQ increased the activation energy of MC nylon.

show abstract

Section: Resultsmentioning

confidence: 99%

Crystallization Kinetics of Modified Nanocellulose/Monomer Casting Nylon Composites

Guo

Tang

et al. 2023

Polymers

View full text Add to dashboard Cite

show abstract

Thermal behavior and soil biodegradation for blends of poly(hydroxybutyrate)/ethylene vinyl acetate copolymer (EVA 60) with 1 mass% NH4Cl

El-Taweel

Al-Ahmadi

2020

Polym. Bull.

View full text Add to dashboard Cite

Starch as a successful biodegradable nucleating agent in biodegradable PHBV/PHO blends

El-Taweel,

Al-Hamdi

2024

J Therm Anal Calorim

View full text Add to dashboard Cite

The morphology and thermal properties of PHBV/PHO/starch blends are investigated using polarized optical microscopy, differential scanning calorimetry, thermal gravimetric analysis, and X-ray diffraction. The crystallization behavior of the PHBV in PHBV/PHO was improved via the incorporation of a biodegradable nucleating agent, starch, as indicated by thermal analysis and polarized optical micrographs. The PHBV and PHO show phase separation in the blend. The XRD patterns of PHBV in blends are identical to those of neat PHBV. The Avrami exponents were not considerably impacted by the presence of PHO or starch. Furthermore, the nucleation constant, Kg, of the PHBV blends was evaluated using a modified Lauritzen–Hoffmann treatment. The Kg values indicated that the crystallization of PHBV in all blends occur in Regime III. PHO and starch have little impact on the maximum degradation temperature of PHBV.

show abstract

Isothermal Crystallization Kinetics of Poly (3-hydroxybutyrate/ Poly(ethylene-co-vinyl acetate) Blends Enhanced by NH₄Cl as a Nucleating Agent

Cited by 4 publications

References 65 publications

Crystallization Kinetics of Modified Nanocellulose/Monomer Casting Nylon Composites

Crystallization Kinetics of Modified Nanocellulose/Monomer Casting Nylon Composites

Thermal behavior and soil biodegradation for blends of poly(hydroxybutyrate)/ethylene vinyl acetate copolymer (EVA 60) with 1 mass% NH4Cl

Starch as a successful biodegradable nucleating agent in biodegradable PHBV/PHO blends

Contact Info

Product

Resources

About

Isothermal Crystallization Kinetics of Poly (3-hydroxybutyrate/ Poly(ethylene-co-vinyl acetate) Blends Enhanced by NH4Cl as a Nucleating Agent

Cited by 4 publications

References 65 publications

Crystallization Kinetics of Modified Nanocellulose/Monomer Casting Nylon Composites

Crystallization Kinetics of Modified Nanocellulose/Monomer Casting Nylon Composites

Thermal behavior and soil biodegradation for blends of poly(hydroxybutyrate)/ethylene vinyl acetate copolymer (EVA 60) with 1 mass% NH4Cl

Starch as a successful biodegradable nucleating agent in biodegradable PHBV/PHO blends

Contact Info

Product

Resources

About

Isothermal Crystallization Kinetics of Poly (3-hydroxybutyrate/ Poly(ethylene-co-vinyl acetate) Blends Enhanced by NH₄Cl as a Nucleating Agent