Flame Retardant Polycaprolactone via Halogen Functionalization
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Solution Overview
Problem
Current polymers lack effective flame retardancy, especially in bio-based materials, which are increasingly sought for sustainable applications but often fail to resist thermal degradation and oxidation.
Innovation Solution
Development of flame retardant polycaprolactone (PCL) through the formation of hydroxyl-functionalized caprolactone molecules, followed by chemical reaction with halides to create halogen-functionalized monomers, and subsequent polymerization to produce PCL with integrated halogen or phosphoryl/phosphonyl groups, enhancing thermal resistance and flame retardancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bio-based polymers are used for sustainable applications, then environmental sustainability is improved, but flame retardancy and thermal resistance deteriorate
Solution Approach 1:
The patent combines bio-based polycaprolactone with halogen-functionalized monomers and phosphoryl/phosphonyl groups to create a composite polymer that maintains the sustainability benefits of bio-based materials while incorporating flame-retardant functional groups. This merging of biodegradable polymer matrix with flame-retardant additives resolves the contradiction between sustainability and flame safety.
Solution Approach 2:
The invention creates composite polymer materials by integrating halogen-functionalized caprolactone monomers and phosphoryl/phosphonyl-containing groups into the polycaprolactone structure. These composite materials exhibit both the environmental benefits of bio-based polymers and the flame-retardant properties of halogenated and phosphorus-containing compounds.
2Ease of manufacture
If standard polymers are used without flame retardant modifications, then ease of manufacture is improved, but thermal stability and flame resistance deteriorate
Solution Approach 1:
The patent modifies the chemical structure of caprolactone by introducing halogen-functionalized groups and phosphoryl/phosphonyl-containing groups at specific positions in the polymer chain. These parameter changes in molecular structure confer flame-retardant properties while maintaining the polymer's processability and manufacturing feasibility through established polymerization methods.
3Reliability
If halogen-functionalized monomers are incorporated into polycaprolactone, then flame retardancy is improved, but manufacturing complexity deteriorates
Solution Approach 1:
The patent employs preliminary functionalization of caprolactone monomers with halogen groups and phosphoryl/phosphonyl-containing groups before polymerization. This preliminary action allows the flame-retardant functional groups to be incorporated into the polymer backbone during standard ring-opening polymerization, avoiding the need for complex post-polymerization modification steps and simplifying the overall manufacturing process.
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 polymers exhibit improved thermal stability and self-extinguishing properties, making them suitable for use in bio-based and petroleum-based materials, particularly in electronic components and printed circuit boards, while maintaining a significant bio-based content.
Implementation Method 1
polymerizing a mixture that includes at least the halogen-functionalized caprolactone monomer to form a flame retardant polycaprolactone
Data Source
AI summary
A process for forming a flame retardant polymer, as well as the flame retardant polymer, are disclosed. A flame retardant polymer is a polymer that can be resistant to thermal degradation and/or thermal oxidation. A flame retardant polymer can be mixed or otherwise incorporated into a standard polymer to give flame retardancy to the standard polymer. The flame retardant polymers can include polycaprolactone functionalized with flame retardant substituents. The flame retardant substituents can include halides, substituted phosphoryl, and substituted phosphonyl.