Poly Alpha-1,3-Glucan Ester Composition for Melt-Processable Articles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing biodegradable polymers like cellulose and starch have poor mechanical properties and require plasticizers, which can lead to issues such as leaching and water uptake, and they are not easily melt-processable without significant upstream processing.
Innovation Solution
Development of poly alpha-1,3-glucan ester derivatives with optimized ester functionalities and plasticizers to enhance melt-processability and mechanical performance, allowing for the production of transparent articles without additional additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional biodegradable polymers like cellulose and starch are used, then environmental degradability is achieved, but mechanical properties deteriorate and plasticizers are required which cause leaching and water uptake
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of poly alpha-1,3-glucan through esterification at specific positions (C2, C4, C6) with controlled degrees of substitution. This chemical modification changes the thermal and mechanical parameters of the polymer, enabling melt-processability while maintaining or improving mechanical strength without requiring plasticizers.
Solution Approach 2:
The patent creates composite material characteristics by introducing ester functional groups into the poly alpha-1,3-glucan structure. The resulting poly alpha-1,3-glucan ester combines the biodegradability of natural glucan with the processability and mechanical properties of esterified polymers, achieving a synergistic material that overcomes the limitations of both components.
2Ease of operation
If plasticizers are added to improve processability, then ease of operation improves, but reliability deteriorates due to leaching and water uptake
Solution Approach 1:
The patent extracts and eliminates the need for plasticizers by directly modifying the polymer structure through esterification. The ester functional groups incorporated into the poly alpha-1,3-glucan chain provide inherent flexibility and processability that would otherwise require external plasticizer additives, thereby removing the source of leaching and water uptake problems.
Solution Approach 2:
The poly alpha-1,3-glucan ester performs self-service by providing its own processability and mechanical properties through internal ester functional groups. The polymer structure itself serves the function that would otherwise require separate plasticizer additives, eliminating the need for external substances and their associated reliability issues.
3Ease of manufacture
If significant upstream processing is applied to achieve melt-processability, then ease of manufacture improves, but loss of substance and time increase
Solution Approach 1:
The patent applies preliminary action by performing esterification modification on the poly alpha-1,3-glucan before the main melt-processing step. This pre-modification prepares the polymer with appropriate thermal and mechanical properties, eliminating the need for extensive upstream processing during production and enabling direct melt-processing with minimal additional time and material loss.
Data Source
AI summary
The disclosure generally relates to poly alpha-1,3-glucan compositions and articles containing them. In particular interest is comprising poly alpha-1,3-glucan ester derivatives. The poly alpha-1,3-glucan derivatives are useful in thermoprocesses and in particular, injection molding processes.