Biomass Polyester with Spiro Monomers for Molding Processability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Biomass-plastics used as alternatives to petroleum-based polyethylene terephthalate (PET) require improved processability to replace PET effectively, as they currently lack the necessary material properties for industrial applications.
Innovation Solution
A polyester is developed through the copolymerization of diacid and polyol monomers, specifically using furan dicarboxylic acid, dialkyl furandicarboxylate, and spiro-diacid or spiro-diol, followed by esterification and condensation polymerization, then solid-state polymerization to enhance molecular weight and zero shear viscosity, facilitating better processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biomass-plastic is used to replace petroleum-based PET, then environmental sustainability is improved, but material properties and processability deteriorate
Solution Approach 1:
The patent modifies the molecular structure parameters of biomass-plastic by incorporating spiro-diacid and spiro-diol monomers with specific ring structures and functional groups. This changes the physical and chemical parameters of the polymer, resulting in improved zero shear viscosity and melt flow characteristics that enhance processability while maintaining the biomass-based sustainable nature of the material
Solution Approach 2:
The patent creates a composite polyester structure by combining furan dicarboxylic acid units with spiro-diacid/spiro-diol units in a copolymerization system. This composite approach integrates the sustainable characteristics of biomass-derived furan monomers with the processability-enhancing properties of spiro-structured monomers, achieving both environmental sustainability and improved manufacturing characteristics
2Ease of operation
If zero shear viscosity is increased to improve processability, then molding performance is improved, but material complexity increases
Solution Approach 1:
The patent achieves improved molding performance by optimizing the zero shear viscosity parameter through controlled incorporation of spiro-diacid and spiro-diol monomers at specific ratios (0.1-10 wt%). This parameter optimization enhances melt flow and filling characteristics during injection, extrusion, and blow molding while maintaining relatively simple processing conditions and equipment requirements
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 resulting polyester exhibits improved zero shear viscosity and enhanced processability, mitigating issues like parison sagging during molding processes, and achieving suitable properties for applications such as injection molding, extrusion molding, or blow molding.
Implementation Method 1
mixing a diacid monomer, an esterified diacid monomer, or a combination thereof with a polyol monomer to perform an esterification
Implementation Method 2
perform an esterification and a condensation polymerization for forming a prepolymer
Implementation Method 3
performing a solid-state polymerization of the prepolymer to form the polyester
Data Source
AI summary
A polyester is copolymerized with diacid monomer, esterified diacid monomer or a combination thereof with a polyol monomer. The diacid monomer, the esterified diacid monomer or the combination thereof includes (1) furan dicarboxylic acid, dialkyl furandicarboxylate, or a combination thereof or (2) furan dicarboxylic acid, dialkyl furandicarboxylate, or a combination thereof and spiro-diacid. The polyol monomer includes (3) C2-C14 polyol or (4) C2-C14 polyol and spiro-diol of Formula (I):and the spiro-diacid of Formula (II):The diacid monomer, esterified diacid monomer or combination thereof and polyol monomer meet: (a) The diacid monomer, the esterified diacid monomer or combination thereof includes (2) furan dicarboxylic acid, dialkyl furandicarboxylate, or the combination thereof and spiro-diacid or (b) The polyol monomer includes (4) C2-C14 polyol and spiro-diol, and an amount of spiro-diol or spriro-diacid is 500 ppm to 2000 ppm based on a weight of furan dicarboxylic acid, dialkyl furandicarboxylate, or combination thereof.