Preparation and Properties of Carbon Dioxide Based Waterborne Polyurethane
Waterborne polyurethane was synthesized using carbon dioxide based polyols(PPCD)as the soft segment composition.The effects of DMPA content and isocyanate index(R value)on the viscosity,particle size,mechanical stability,and high-temperature storage stability of waterborne polyurethane were investigated.The results showed that when the DMPA content was 5%and the R value was 1.4,carbon dioxide based waterborne polyurethane with high solid content and suitable viscosity exhibited excellent mechanical and thermal storage stability.This means that the sample can be easily matched with various construction viscosities,and the product shelf life exceeds six months.This article further explores the mechanical properties,hydrolysis resistance,and oleic acid resistance of polyurethane prepared from carbon dioxide based polyols and other commonly used polyols(polycarbonate polyols,polybutylene adipate glycol,tetrahydrofuran ether glycol,and polypropylene glycol ether glycol).The results show that The mechanical properties of carbon dioxide based polyols and polybutylene adipate diols are comparable,at the same time,its hydrolysis resistance is comparable to polycarbonate polyols.Therefore,low-cost carbon dioxide based polyols are expected to replace polycarbonate polyols in applications with high mechanical properties and hydrolysis resistance requirements,responding to the national carbon neutrality policy while achieving product cost reduction.
carbon dioxide based polyolswater based polyurethanestabilitymechanical propertieshydrolysis resistance
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