Biomass Resin Composition for High Rigidity and Fast Solidification
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Solution Overview
Problem
Conventional resin compositions with biomass-derived carbon atoms, such as cellulose acylate, face challenges in achieving high rigidity and short solidification times in molded articles due to the addition of plasticizers, which often result in longer cycle times and reduced rigidity.
Innovation Solution
A resin composition comprising a biomass-derived carbon atom-containing resin (A) with a higher mass content and higher glass transition temperature, paired with a resin (B) incompatible with (A) and a plasticizer (C), where the content of resin (A) is greater than resin (B), and the glass transition temperature of resin (A) is higher than resin (B), allowing for improved flowability and accelerated solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a plasticizer is added to enhance flowability in heating, then flowability is improved, but rigidity of the molded article decreases
Solution Approach 1:
The patent divides the resin system into two incompatible resins (A) and (B), where resin (A) provides rigidity and resin (B) accommodates the plasticizer. This segmentation allows the plasticizer to be isolated in resin (B), preventing it from degrading the rigidity of resin (A) while still providing flowability enhancement through the resin (B) phase.
2Ease of operation
If a plasticizer is added to enhance flowability, then flowability is improved, but solidification time increases
Solution Approach 1:
By segmenting the resin system into two incompatible phases, the patent allows resin (A) to solidify quickly due to its higher glass transition temperature, while resin (B) containing the plasticizer provides the necessary flowability during processing. The phase separation ensures that the plasticizer does not significantly delay the solidification of the rigid resin (A) matrix.
Solution Approach 2:
The patent utilizes the difference in glass transition temperatures between resin (A) and resin (B) to control solidification behavior. Resin (A) with higher Tg solidifies faster and provides rigidity, while resin (B) with lower Tg remains more flexible and accommodates the plasticizer, enabling flowability without excessive solidification time penalty.
3Ease of operation
If resin (B) with lower glass transition temperature is used to improve flowability, then flowability is enhanced, but rigidity of the molded article decreases
Solution Approach 1:
The patent employs phase separation between two incompatible resins, where resin (A) with higher glass transition temperature forms the rigid matrix and resin (B) with lower glass transition temperature forms a separate phase that accommodates the plasticizer. This segmentation ensures that the lower-Tg resin (B) does not dominate the overall mechanical properties, as it is isolated in its own phase and does not compromise the rigidity provided by resin (A).
Solution Approach 2:
Different regions of the molded article have different local properties: the resin (A) rich regions provide rigidity and structural strength, while the resin (B) rich regions provide flexibility and flowability. This local quality differentiation allows the article to exhibit both rigidity and processability without requiring a compromise in overall mechanical properties.
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 composition achieves high rigidity and reduced solidification time in molded articles by ensuring the plasticizer is predominantly present in resin (B), enhancing flowability and moldability while maintaining high surface impact strength.
Implementation Method 1
a resin (B) incompatible with the resin (A)... the plasticizer is predominantly present in resin (B)
Implementation Method 2
a glass transition temperature Tg(A) of the resin (A) is higher than a glass transition temperature Tg(B) of the resin (B)... accelerated solidification
Data Source
AI summary
Provided is a resin composition containing: a resin (A) having a biomass-derived carbon atom; a resin (B) incompatible with the resin (A); and a plasticizer (C), in which a content of the resin (A) is larger than a content of the resin (B), and a glass transition temperature Tg(A) of the resin (A) is higher than a glass transition temperature Tg(B) of the resin (B).