Polyalkylene Carbonate Resin Composition Transparency Mechanical Strength
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Solution Overview
Problem
Resin compositions containing polyalkylene carbonate and polylactide face challenges in maintaining transparency and mechanical properties, with issues such as rapid deterioration of physical properties, fusion-bonding problems, and difficulty in achieving uniform compatibility and stability during processing.
Innovation Solution
A resin composition comprising 100 parts by weight of polyalkylene carbonate, 0.5 to 50 parts by weight of polylactide, and 0.5 to 35 parts by weight of polymethylmethacrylate, which maintains biodegradability and mechanical properties while achieving a haze value of 40% or less, ensuring excellent transparency and workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polyalkylene carbonate is mixed with polylactide to improve physical properties, then biodegradability and mechanical strength are improved, but transparency deteriorates and physical properties are rapidly deteriorated
Solution Approach 1:
The patent applies parameter changes by carefully controlling the composition ratios of polyalkylene carbonate and polylactide within specific ranges (polylactide content: 1-40 wt%, preferably 5-30 wt%). This quantitative parameter optimization allows the resin composition to achieve both improved mechanical strength and maintained transparency, resolving the contradiction between these two properties.
Solution Approach 2:
The patent creates a composite resin composition by combining polyalkylene carbonate and polylactide in specific proportions. This composite material approach allows the synergistic effects of both polymers to be utilized, achieving enhanced mechanical properties while maintaining the transparency characteristics of polyalkylene carbonate through proper compositional design.
2Ease of manufacture
If polyalkylene carbonate is formed into pellet or film, then it can be processed, but blocking phenomenon occurs and dimensional stability deteriorates
Solution Approach 1:
The patent introduces polylactide as an intermediary component that modifies the behavior of polyalkylene carbonate during processing. The polylactide acts as a mediator that prevents the blocking phenomenon between polyalkylene carbonate surfaces while maintaining dimensional stability, enabling successful pellet and film formation without the adverse effects of pure polyalkylene carbonate.
3Strength
If polylactide content is increased to improve mechanical properties, then biodegradability is enhanced, but physical properties of polyalkylene carbonate are rapidly deteriorated
Solution Approach 1:
The patent applies parameter changes by establishing optimal composition ranges where polylactide content is controlled at 1-40 wt% (preferably 5-30 wt%). This parameter optimization ensures that mechanical properties are enhanced through polylactide addition while the fundamental physical properties and stability of polyalkylene carbonate are preserved, avoiding rapid deterioration.
Data Source
AI summary
Disclosed herein is a resin composition including polyalkylene carbonate, polylactide and polyalkyl(meth)acrylate, which exhibits excellent biodegradability, mechanical properties and transparency. The resin composition can be used in various fields of films, sheets, disposable goods, electronic products, automobile interior materials, and the like.