Aliphatic Polycarbonate Adhesion to Glass via Functional Groups
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Solution Overview
Problem
Aliphatic polycarbonate polymers struggle to adhere effectively to glass and other inorganic materials, limiting their use in composite materials and glass laminates due to insufficient adhesion and wetting properties.
Innovation Solution
Incorporating adhesion-enhancing functional groups such as silicon-containing, carboxylic acid, sulfonic acid, and ammonium groups into the aliphatic polycarbonate chains, either by modifying the chain ends or introducing them during copolymerization, to improve adhesion and wetting capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aliphatic polycarbonate polymers are used as drop-in replacements for petroleum-derived thermoplastics, then CO2 sequestration and displacement of petroleum derivatives are achieved, but adhesion to glass and inorganic materials remains insufficient
Solution Approach 1:
The patent introduces adhesion-enhancing functional groups (silicon-containing groups, carboxylic acid groups, sulfonic acid groups, ammonium groups) at specific locations along the polycarbonate chains, particularly at chain ends. This creates local regions of enhanced adhesion capability without altering the bulk properties of the polymer, allowing the material to maintain its inherent characteristics while gaining improved bonding to glass and inorganic materials at critical interface zones.
Solution Approach 2:
The patent creates a composite structure at the molecular level by incorporating heteroatom-containing functional groups into the polycarbonate chain structure. These functional groups act as distinct phases within the polymer matrix, providing specific adhesion functions while the polycarbonate backbone maintains the bulk mechanical properties. This composite approach enables the material to exhibit both the desired adhesion characteristics and the structural integrity of the original polymer.
2Reliability
If chemical functionality is introduced to enhance adhesion, then wetting properties improve, but polymer structure complexity increases
Solution Approach 1:
The patent introduces adhesion-enhancing functional groups (silicon-containing groups, carboxylic acid groups, sulfonic acid groups, ammonium groups) at specific locations along the polycarbonate chains, particularly at chain ends. This creates local regions of enhanced adhesion capability without altering the bulk properties of the polymer, allowing the material to maintain its inherent characteristics while gaining improved bonding to glass and inorganic materials at critical interface zones.
Solution Approach 2:
The patent modifies the chemical parameters of the polycarbonate chains by introducing functional groups with specific heteroatoms (Si, O, N, S). These parameter changes alter the surface chemistry and electronic structure of the polymer, enabling improved wetting and adhesion properties. The modifications are controlled in terms of type, quantity, and distribution of functional groups to achieve desired performance while managing structural complexity.
Data Source
AI summary
The present invention encompasses polymer compositions comprising aliphatic polycarbonate chains containing functional groups that increase the polymer's ability to wet or adhere to inorganic materials. In certain embodiments, chain ends of the aliphatic polycarbonates are modified to introduce silicon-containing functional groups, boron-containing functional groups, phosphorous-containing functional groups, sulfonic acid groups or carboxylic acid groups.