Polyester Composition Renewable Acid Balance
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Solution Overview
Problem
Conventional polymer materials face challenges in achieving a balance between high mechanical properties, such as ultimate tensile strength, elastic modulus, and elongation on fracture, while also reducing environmental impact by minimizing non-renewable carbon resource consumption.
Innovation Solution
A polymer composition comprising 1-99% aromatic polyester derived from renewable heterocyclic aromatic acids and 99-1% aromatic aliphatic polyester, which are biodegradable and produced through known processes, offering improved mechanical properties and reduced environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional polymer materials are used to achieve high mechanical properties (ultimate tensile strength, elastic modulus, elongation on fracture), then mechanical performance is improved, but environmental impact increases due to consumption of non-renewable carbon resources
Solution Approach 1:
The patent changes the chemical composition parameters of the polyester by incorporating aromatic units from renewable sources (biogenic carbon) into the polymer chain. This substitution of fossil-based feedstock with renewable feedstock maintains mechanical properties while reducing environmental impact and CO2 emissions.
Solution Approach 2:
The patent creates a composite polyester material combining aromatic units from renewable sources with aliphatic units, achieving a balanced composition that delivers both high mechanical performance (ultimate tensile strength, elastic modulus, elongation on fracture) and environmental sustainability through reduced non-renewable resource consumption.
2Strength
If polymer materials are designed for high mechanical performance, then strength and durability are improved, but workability and ease of processing deteriorate
Solution Approach 1:
The patent applies local quality by distributing aromatic and aliphatic units throughout the polyester chain in a balanced composition. This creates regions of varying flexibility and strength along the polymer chain, achieving both high mechanical performance and good processability through the synergistic combination of rigid aromatic segments and flexible aliphatic segments.
Solution Approach 2:
The patent optimizes the composition parameters of the polyester, specifically the ratio and arrangement of aromatic to aliphatic units, to achieve a balance between mechanical strength and workability. By controlling the molecular structure and composition, the material exhibits both high strength and good ease of manufacture.
Data Source
AI summary
A polymer composition comprising at least two polyesters having improved mechanical properties including a good balance between ultimate tensile strength, elastic modulus and elongation on failure. In particular, the composition comprises from 1 to 99% by weight of at least one aromatic polyester (AP) comprising units from a diol component and units from an acid component, the units from the acid component comprising from 70 to 100 mol % of repeating units from at least one heterocyclic polyfunctional aromatic acid of renewable origin and from 99 to 1% by weight of at least a second aliphatic-aromatic polyester (AAPE). This composition is suitable for producing articles such as films, moulded objects, thermoformed objects or expanded articles. The heterocyclic aromatic acid is 2,5-furandicarboxylic acid and the aliphatic-aromatic polyester is biodegradable and is a copolyester comprising repeating units from aromatic acid of the phthalic acid type, aliphatic diacids, and aliphatic diols.