Peroxide Absorption into Polymer Particles Using Squalane
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Solution Overview
Problem
The absorption/coating process for peroxide compounds into polymer particles used for electric cable insulation is time-consuming, and increasing temperature to enhance absorption rates increases energy costs and risks premature decomposition, making it commercially infeasible to alter polymer or peroxide compositions for faster absorption.
Innovation Solution
Incorporating a branched, hydrocarbon oil such as squalane as an absorption-promoting additive during the absorption/coating process at temperatures above the peroxide's melting point but below the polymer's softening point, significantly increasing the absorption rate of peroxides into polymer particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the temperature is increased to enhance the absorption rate of peroxide into polymer particles, then the absorption rate is improved, but the energy costs increase and the risk of premature decomposition increases
Solution Approach 1:
A branched hydrocarbon oil (absorption-promoting additive) is introduced as an intermediary substance that facilitates the absorption of peroxide into polymer particles. This additive acts as a mediator between the peroxide and polymer, enabling faster absorption at lower temperatures without requiring increased energy input or risking premature decomposition.
2Productivity
If the temperature is increased to enhance the absorption rate of peroxide into polymer particles, then the absorption rate is improved, but the risk of premature decomposition increases
Solution Approach 1:
The branched hydrocarbon oil serves as a protective intermediary that enables the absorption process to occur at lower temperatures. By mediating between the peroxide and polymer, it allows the absorption to proceed rapidly without requiring temperature increases that would trigger premature peroxide decomposition, thereby maintaining reliability.
3Manufacturing precision
If the absorption/coating process is made time-consuming to ensure adequate coating, then the absorption quality is improved, but the productivity decreases
Solution Approach 1:
The branched hydrocarbon oil acts as a catalytic intermediary that accelerates the absorption process. Its presence enables adequate coating quality to be achieved in significantly reduced time, transforming a time-consuming process into a high-speed operation while maintaining the necessary absorption quality for effective peroxide incorporation.
4Reliability
If the molecular weight of the peroxide compound is increased to improve performance, then the cross-linking performance is improved, but the absorption rate decreases
Solution Approach 1:
The branched hydrocarbon oil functions as a mediating substance that decouples the relationship between peroxide molecular weight and absorption rate. It enables high molecular weight peroxides (which provide superior cross-linking performance) to be absorbed at rapid rates by facilitating their diffusion and incorporation into the polymer particles, thus resolving the trade-off between performance and productivity.
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 use of squalane allows for faster absorption and increased cross-linking of peroxides at lower temperatures, reducing the time and amount of peroxide needed, while maintaining electrical insulation performance and safety.
Implementation Method 1
the peroxide compound is contacted under physical mixing conditions with at least one peroxide compound at a temperature above the melting point of the peroxide compound but below the softening point of the polymer particles
Implementation Method 2
the peroxide compound to absorb into the polymer particles
Implementation Method 3
at a temperature that is above the melting point of the peroxide compound
Implementation Method 4
The presence of the absorption-promoting additive, which preferably comprises a branched, hydrocarbon oil, substantially increases the rate at which the peroxide compound is absorbed into the polymer particles
Data Source
AI summary
The present invention provides a method of increasing the absorption rate of peroxides into polymer particles used to fabricate electrical cable insulation. The method includes contacting the polymer particles with a peroxide compound and an additive under physical mixing conditions at a temperature that is above the melting point of the peroxide compound but below the softening point of the polymer particles for a period of time sufficient to allow the peroxide compound to absorb into the polymer particles. Preferably, the additive is squalane or another branched, hydrocarbon oil that substantially increases the rate at which the peroxide compound is absorbed into the polymer particles and improves the peroxide cure.