Ethylene-Polymer Solar Panel Composition for UV and Chlorine Resistance
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Solution Overview
Problem
Polypropylene-based solar panels face issues with UV degradation, poor resistance to chlorinated water, and low temperature impact resistance, which affect their durability and performance in solar water heating systems, especially in desert environments with significant temperature fluctuations.
Innovation Solution
A solar panel composition comprising an ethylene-based polymer, a specific antioxidant compound, and a UV stabilizer, which enhances UV resistance, impact resistance, and weatherability, using a formulation that includes compounds from defined chemical formulas and a weight ratio of components to improve the material's properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polypropylene is used for solar panels, then processability and price performance are improved, but UV resistance and weatherability deteriorate
Solution Approach 1:
The patent uses polypropylene as the base polymer and combines it with specific antioxidants (mix of phenolic and phosphite types) and UV stabilizers to create a composite material system. This composite approach allows the polypropylene to maintain its excellent processability while the added compounds provide enhanced UV resistance and weatherability, resolving the contradiction between ease of manufacture and reliability.
2Object-affected harmful factors
If carbon black is added to screen UV, then UV protection is improved, but polymer degradation accelerates due to prodegradant effects
Solution Approach 1:
The patent acknowledges that carbon black can be prodegradant to polypropylene but converts this harmful effect into a benefit by carefully controlling the carbon black content and combining it with a specific mixture of antioxidants and UV stabilizers. The antioxidants scavenge free radicals generated by carbon black, while UV stabilizers prevent polymer chain scission, thus converting the potentially harmful prodegradant effect into effective UV protection without accelerating degradation.
Solution Approach 2:
The patent optimizes the concentration of carbon black and the specific ratios of antioxidants and UV stabilizers to achieve the right balance. By carefully adjusting these parameters, the system achieves effective UV screening while minimizing the prodegradant effects of carbon black through the protective action of the additive package.
3Reliability
If antioxidant additives are increased to improve chlorine resistance, then resistance to chlorinated water is improved, but low temperature ductility deteriorates
Solution Approach 1:
The patent uses a specific mixture of antioxidants (phenolic and phosphite types) in optimized ratios rather than simply increasing the total antioxidant content. This parameter optimization allows achieving good chlorine resistance while maintaining low temperature ductility by selecting antioxidant types and concentrations that do not excessively embrittle the polypropylene.
Data Source
AI summary
The invention provides a panel comprising at least the following components: a) at least one hollow container; b) an inlet; c) an outlet; and wherein the inlet is connected to the end of the at least one hollow container; and the outlet is connected to an opposite end of the at least one hollow container; and wherein the at least one hollow container comprises at least one component formed from a composition comprising the following components: A) an ethylene-based polymer; B) a compound selected from Formula 1, as described herein; and C) a compound selected from Formula 2, as described herein; and wherein the weight ratio of Component C to Component B (C/B) is greater than, or equal to, 1.