Effect of the interchain interaction on the crystallization kinetics and crystal structure of polylactic acid under nitrogen DOI

Qianyun Peng,

Shaojie Li,

Feng Liu

et al.

CrystEngComm, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

In order to prepare polylactic acid (PLA) foam material with excellent performance by utilizing nitrogen (N 2 ), the crystallization behavior of PLA under N has been studied.

Language: Английский

In-situ cross-linking strategy for achieving excellent impact resistance and thermal insulation of closed-cell poly(lactic acid) (PLA)/poly(4-hydroxybutyrate) (P4HB) foams DOI

Xinyi Chen,

Sisi Tian,

Yiwei Fu

et al.

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 140669 - 140669

Published: Feb. 1, 2025

Language: Английский

Citations

0
Preparation of Pebax Foam Based on Chain Extension via Supercritical CO2-Assisted Two-Step Foaming DOI
Lei Zhang,

Genshi Liu,

Zuoze Fan

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Polyether block amide (Pebax) is difficult to prepare high expansion ratio (ER) foam in a wide range of foaming temperatures by supercritical CO2-assisted due its weak melt strength and complex crystallization behavior. In this work, Pebax with ER was prepared two-step under CO2 after chain extension modification. The results showed that the addition extender significantly increased improved behavior Pebax. At same time, window temperature reduced from 160 140 °C, which realizes large-span control 1.2 times 39.1 for first time. addition, second isothermal process regulated achieve preparation rate at different temperatures. What more interesting has minimum thermal conductivity 30.5 mW m–1 K–1, good insulation properties.

Language: Английский

Citations

0
Enhanced Cyclic Compression Performance of Polyolefin Elastomer Foams with Novel Open-Cell Structures Through Mixed Gases Regulation DOI

Daoen Yu,

Shaozhe Shi,

Fangfang Zou

et al.

The Journal of Supercritical Fluids, Journal Year: 2025, Volume and Issue: unknown, P. 106617 - 106617

Published: April 1, 2025

Language: Английский

Citations

0
Innovative Enhancement of Mechanical and Thermal Properties of Polylactic Acid Foam by Adjusting Crystallization DOI

Ao'hua Wang,

Ruijing Meng,

Yuyuan Fan

et al.

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Polylactic acid (PLA) foam, known for its biodegradability and biocompatibility, faces limitations due to poor melt viscosity low crystallinity. To address these issues, this research utilizes ethylene‐glycidyl methacrylate copolymer as a chain extender (CE) enhance PLA incorporates the nucleating agent diphenylhydrazide sebacic (ST‐NAB3) adjust crystallization characteristics. The CEPLA/ST‐NAB3 material is developed foamed using supercritical CO 2 an intermittent method. Observations by polarizing microscope differential scanning calorimeter show increases in both rate crystallinity of sample. When ST‐NAB3 content 0.4 wt%, transformation from spherulite string crystal morphology occurs. Rheological tests higher strength compared with pure PLA, thereby improving foaming behavior. temperature 108 °C, foam wt% has smallest cell size highest density, which are 55.38 μm 3.95 × 10 6 cells cm −3 , respectively. Following annealing treatment, compressive containing 5.35 MPa, while Vicat softening rises 87.4 °C. This study offers effective approach performance foams, expanding their potential applications various industries.

Language: Английский

Citations

0
Applications and environmental impact of biodegradable polymers in textile industry: A review DOI

Sadia Razzaq,

Salma Shahid, Yasir Nawab

et al.

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: unknown, P. 136791 - 136791

Published: Oct. 1, 2024

Language: Английский

Citations

3
Preparation of a High-Expansion-Ratio Blend Foam with Low Thermal Conductivity Using Poly(vinyl alcohol)-Polycaprolactone Mixture Solution via Supercritical Carbon Dioxide Foaming Technology DOI

Meijiang Lin,

Yishen Zhao, Yao Wang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(34), P. 15124 - 15132

Published: Aug. 13, 2024

Energy consumption in the field of heat preservation increases every year, so it is important to develop foam with a good thermal insulation properties. In this work, method for fabrication poly(vinyl alcohol)-polycaprolactone (PVA–PCL) blend foams high expansion ratio and low conductivity using PVA–PCL mixture solution via supercritical carbon dioxide (scCO2) foaming was proposed. A water content used as coblowing agent, differences behaviors between PVA PCL were introduce large cells into foam, which together increased foam. The effects content, saturation time, temperature, pressure, assistant solvent (water) on behavior scCO2 investigated. results show that has (44) (25.97 mW·m–1·K–1).

Language: Английский

Citations

0
Effect of the interchain interaction on the crystallization kinetics and crystal structure of polylactic acid under nitrogen DOI

Qianyun Peng,

Shaojie Li,

Feng Liu

et al.

CrystEngComm, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

In order to prepare polylactic acid (PLA) foam material with excellent performance by utilizing nitrogen (N 2 ), the crystallization behavior of PLA under N has been studied.

Language: Английский

Citations

0