Bio-Based Polyurethane Asphalt Binder with Continuous Polymer-Phase Structure: Critical Role of Isocyanate Index in Governing Thermomechanical Performance and Phase Morphology

Bio-Based Polyurethane Asphalt Binder with Continuous Polymer-Phase Structure: Critical Role of Isocyanate Index in Governing Thermomechanical Performance and Phase Morphology

Polyurethane asphalt (PUA) has attracted considerable attention in the field of pavement engineering. However, traditional PUA systems typically exhibit low concentrations of polyurethane (PU), leading to a continuous bitumen-dominated phase that adversely affects mechanical properties. Furthermore,...

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Bibliographic Details
Main Authors: Haocheng Yang, Suzhou Cao, Chengwei Wu, Zhonghua Xi, Jun Cai, Zuanru Yuan, Junsheng Zhang, Hongfeng Xie
Format: Article
Language:English
Published: MDPI AG 2025-06-01
Series:Molecules
Subjects:
polyurethane asphalt
bio-based polyurethane
isocyanate index
glass transition temperature
phase separation
mechanical properties
Online Access:https://www.mdpi.com/1420-3049/30/11/2466
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