EVOH Resin Composition Using Carbon-14 Polypropylene for Thermal Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
EVOH resin compositions containing polypropylene for modification exhibit inferior thermal stability compared to those consisting solely of EVOH, necessitating further improvements.
Innovation Solution
Incorporating a carbon-14-containing polypropylene resin and a boron compound into the EVOH resin composition, with specific mass ratios and content ranges to enhance thermal stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polypropylene is incorporated into EVOH resin composition to improve flexibility and other physical properties, then physical properties are improved, but thermal stability deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the polypropylene resin through carbon-14 labeling, which alters the molecular structure and bonding characteristics. This isotopic modification changes the thermal decomposition behavior while preserving the mechanical properties needed for film flexibility and strength.
Solution Approach 2:
The patent creates a composite resin composition combining EVOH with carbon-14-containing polypropylene resin in specific ratios (EVOH 10-99 mass%, polypropylene 1-90 mass%). This composite approach allows the synergistic combination of EVOH's barrier properties with polypropylene's mechanical properties while achieving improved thermal stability through the unique isotopic composition.
2Ease of manufacture
If EVOH is blended with thermoplastic resins to improve physical properties, then processability and mechanical properties are improved, but thermal stability deteriorates
Solution Approach 1:
The patent modifies the thermal properties of the blend by using carbon-14-labeled polypropylene resin, which has altered bonding energy and thermal decomposition characteristics compared to conventional polypropylene. This parameter change in the resin composition allows improved processability while maintaining thermal stability.
3Stability of the object's composition
If EVOH is used alone to maintain thermal stability, then thermal stability is maintained, but flexibility and other physical properties deteriorate
Solution Approach 1:
The patent resolves this contradiction by creating a composite material system where carbon-14-containing polypropylene resin is blended with EVOH in optimized ratios. The polypropylene component provides flexibility and processability, while the unique isotopic composition of the polypropylene contributes to enhanced thermal stability, allowing both requirements to be satisfied simultaneously.
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 resin composition exhibits improved thermal stability, making it suitable for use in molded bodies and multilayer structures.
Implementation Method 1
the carbon-14-containing polypropylene resin exhibits stronger binding energy due to the primary isotope effect, leading to slowed decomposition and increased thermal stability
Implementation Method 2
a synergistic effect exists between the carbon-14 containing polypropylene resin and the boron compound (C) which has an effect of suppressing thermal degradation
Data Source
AI summary
Provided is a resin composition comprising an ethylene-vinyl alcohol copolymer and a polypropylene resin having excellent thermal stability. The resin composition comprises an ethylene-vinyl alcohol copolymer (A), a carbon-14-containing polypropylene resin (B), and a boron compound (C).