The Catalytic Degradation of Waste PU and the Preparation of Recycled Materials DOI Open Access
Xiaohua Gu, Jiahao Xu,

Shangwen Zhu

et al.

Polymers, Journal Year: 2024, Volume and Issue: 16(24), P. 3581 - 3581

Published: Dec. 21, 2024

In this paper, we investigated the efficient metal-free phosphorus–nitrogen (PN) catalyst and used PN to degrade waste PU with two-component binary mixed alcohols as alcohol solvent. We examined effects of reaction temperature, time, other factors on hydroxyl value viscosity degradation products; focused changing rules value, viscosity, molecular weight polyols recovered from products different dosages catalyst; determined optimal experimental conditions temperature 180 °C, time 3 h, dosage 0.08%. The were h 0.08% dosage, obtained polyol was 3716 mPa·s, 409.2 mgKOH/g, number average 2616. FTIR, 1H, NMR, tests showed that urethanes degraded into oligomers successfully, recycled polyether obtained, a series polyurethanes substitution ratios then prepared. A polyurethane materials rates prepared characterized by SEM, compression strength, thermal conductivity tests, which foams had good physical properties such strength apparent density, SEM test at 20% rate helped improve structure blisters.

Language: Английский

Self-healing waterborne polyurethane originated from waste PET and their composites with polypyrrole for stretchable strain sensor DOI
Keming Zhu, Lan Yang, Xing Zhou

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161515 - 161515

Published: March 1, 2025

Language: Английский

Citations

1
A Comprehensive Review of Polyurethane: Properties, Applications and Future Perspectives DOI
Shuang Wu,

Shaoping Ma,

Qinghua Zhang

et al.

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128361 - 128361

Published: April 1, 2025

Language: Английский

Citations

0
High-Strength, Rapid-Recovery, Solvent-Resistant, and Recyclable Fluorinated Acrylic Polyurethane with Supramolecular and Covalently Dual-Cross-linked Networks DOI

Pengwei Xie,

Guoqiang Wu, Yubo Liu

et al.

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Language: Английский

Citations

0
The Catalytic Degradation of Waste PU and the Preparation of Recycled Materials DOI Open Access
Xiaohua Gu, Jiahao Xu,

Shangwen Zhu

et al.

Polymers, Journal Year: 2024, Volume and Issue: 16(24), P. 3581 - 3581

Published: Dec. 21, 2024

In this paper, we investigated the efficient metal-free phosphorus–nitrogen (PN) catalyst and used PN to degrade waste PU with two-component binary mixed alcohols as alcohol solvent. We examined effects of reaction temperature, time, other factors on hydroxyl value viscosity degradation products; focused changing rules value, viscosity, molecular weight polyols recovered from products different dosages catalyst; determined optimal experimental conditions temperature 180 °C, time 3 h, dosage 0.08%. The were h 0.08% dosage, obtained polyol was 3716 mPa·s, 409.2 mgKOH/g, number average 2616. FTIR, 1H, NMR, tests showed that urethanes degraded into oligomers successfully, recycled polyether obtained, a series polyurethanes substitution ratios then prepared. A polyurethane materials rates prepared characterized by SEM, compression strength, thermal conductivity tests, which foams had good physical properties such strength apparent density, SEM test at 20% rate helped improve structure blisters.

Language: Английский

Citations

0