CO2-Based Polyester Polymer via Ring-Opening Polymerization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current CO2-based polymers, such as polycarbonates and polyols, fail to meet the requirements of cost-effectiveness, material performance, and degradability, and they do not effectively utilize CO2 to reduce emissions.
Innovation Solution
A novel CO2-based polyester polymer compound is synthesized through the ring-opening polymerization of diethyl-substituted six-membered cyclic lactones derived from CO2, H2, and 1,3-butadiene, using organic bases as catalysts, which results in high molecular weight polymers with exceptional transparency and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional CO2-based polymers (polycarbonates and polyols) are produced, then CO2 utilization is achieved, but the polymers fail to meet requirements of cost-effectiveness, material performance, and degradability simultaneously
Solution Approach 1:
The patent changes the chemical structure parameters by using diethyl-substituted six-membered cyclic lactone monomers with specific molecular weight ranges ( Mn: 10,000-100,000 g/mol) and controlled polydispersity (Ð: 1.05-1.50). These parameter optimizations enable the polymer to achieve both degradability through ester bond hydrolysis and cost-effectiveness through efficient CO2 utilization (20-40 wt% CO2 content) via ring-opening polymerization
Solution Approach 2:
The patent creates a composite polymer structure combining CO2-derived cyclic carbonate units with diethyl-substituted lactone units in a copolymer chain. This composite structure integrates the benefits of both components: the carbonate units provide CO2 utilization and structural stability, while the lactone units with ester bonds provide degradability and cost-effectiveness through efficient polymerization
2Quantity of substance
If CO2-based polymers are synthesized to reduce emissions, then CO2 utilization increases, but the amount of CO2 utilized is insufficient to effectively reduce CO2 emissions
Solution Approach 1:
The patent optimizes the CO2 content parameter in the polymer to range from 20-40 wt%, which maximizes the quantity of CO2 fixed per unit mass of polymer. This parameter optimization, combined with high molecular weight polymer production (Mn: 10,000-100,000 g/mol), significantly increases the total amount of CO2 utilized and thereby improves emission reduction effectiveness
3Reliability
If polymers with high molecular weight and exceptional performance are produced, then material performance improves, but the polymers may become difficult to process into desired forms
Solution Approach 1:
The patent carefully balances the molecular weight parameter (Mn: 10,000-100,000 g/mol) and polydispersity (Ð: 1.05-1.50) to achieve optimal processability. The moderate molecular weight range ensures high molecular weight for performance while maintaining sufficient chain flexibility and melt flow for processing into various forms. The narrow polydispersity further enhances both performance consistency and processing behavior
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The synthesized polyester polymers exhibit high transparency, high stability, and can be completely degraded back to their monomers under specific conditions, addressing the challenges of cost, performance, and recyclability in existing CO2-based polymers.
Implementation Method 1
the ring-opening polymerization (ROP) of heterocyclic lactones, for example, polyHL is obtained through the ring-opening polymerization (ROP) of diethyl-substituted six-membered cyclic lactone
Implementation Method 2
using organic bases as catalysts, which results in high molecular weight polymers with exceptional transparency and stability
Implementation Method 3
a cyclic polymer synthesized though anionic ring-opening polymerization of heterocyclic lactones in the present disclosure can be degraded back to the lactone monomer HL under specific conditions
Data Source
AI summary
The present disclosure relates to the technical field of polymer synthesis, and in particular, to a polyester polymer compound and a preparation method thereof, the method employs a heterocyclic lactone of formula 1 as a raw material and carries out a ring-opening polymerization reaction catalyzed by an organic base to obtain the polyester polymer compound of formula 2 and/or formula 3. The present disclosure also discloses δLH2 and a preparation method thereof. The method described in the present disclosure realizes the preparation of these polyester polymer compounds for the first time. The method in the present disclosure utilizes a wide range of raw materials and a simple, cost-effective catalyst with excellent activity. The present disclosure effectively alleviates the harm caused by the greenhouse effect. The present disclosure also discloses the use of these polyester polymer compounds, where the prepared polymer film is colorless, transparent, and has good flexibility, viscoelasticity, and the like. The polyester polymer compounds have good physicochemical properties and recyclability, and are promising for a wide range of applications.