Soluble PPM Copolymer Coating Without External Plasticizers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing poly(phenylene methylene) (PPM) copolymers have low molar mass, are insoluble in common solvents, and require external plasticizers, limiting their industrial application and processability.
Innovation Solution
A copolymer comprising specific monomers with reactive groups that allow for high molar mass and solubility in organic solvents, using a Lewis acid catalyst for polymerization without external plasticizers, resulting in a thermoplastic material with enhanced thermal stability and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PPM is used as a corrosion protective coating, then corrosion resistance is improved, but processability deteriorates due to low solubility and requirement for external plasticizers
Solution Approach 1:
The patent modifies the chemical structure of PPM by introducing n-octyloxy side chains at the para-position of phenylene units. This parameter change in molecular structure fundamentally alters the polymer's properties: it dramatically improves solubility in common organic solvents (chloroform, dichloromethane, THF) and eliminates the need for external plasticizers while maintaining high molar mass (>100 kDalton) and corrosion protective functionality.
Solution Approach 2:
The invention creates a copolymer composite structure combining phenylene units with n-octyloxy side chains. This composite molecular architecture integrates the corrosion resistance of the phenylene backbone with the solubility and flexibility benefits of the alkoxy side chains, achieving both improved processability and maintained protective function without requiring separate additive components.
2Stability of the object's composition
If copolymers with n-octyloxy side chains are used to avoid external plasticizers, then material properties are improved, but molar mass decreases and solubility is limited
Solution Approach 1:
The patent optimizes the substitution pattern by placing n-octyloxy groups specifically at the para-position of phenylene units, which prevents excessive chain branching and cross-linking. This parameter control in molecular architecture enables the polymer to achieve high molar mass (>100 kDalton) while maintaining the beneficial material properties of n-octyloxy side chains, including improved solubility and eliminated need for external plasticizers.
3Strength
If external plasticizers are used to prevent cracking, then coating flexibility is improved, but coating integrity deteriorates due to stiffness of the polymer
Solution Approach 1:
The patent extracts and eliminates the need for external plasticizer additives by incorporating n-octyloxy side chains directly into the polymer backbone structure. This removes the harmful interaction between external plasticizers and the stiff polymer matrix, preventing the cracking issues that arise from incompatibility between additives and the base polymer while maintaining the necessary flexibility and integrity.
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 copolymer achieves high thermal stability, solubility, and corrosion resistance, enabling efficient processing and self-healing properties, suitable for industrial applications as a corrosion-protective coating with reduced thickness and environmental impact.
Implementation Method 1
using a Lewis acid catalyst for polymerization
Implementation Method 2
high thermal stability
Implementation Method 3
soluble in common organic solvents such as chloroform, dichloromethane or THF
Implementation Method 4
the fluorescence of the copolymer of the present invention facilitates detection of failures in the coating upon corrosion
Data Source
AI summary
A copolymer and its use as coating whereby the copolymer comprises a first monomer of the general formula (I)and a second monomer of the general formula (II)wherein Y is selected from the group consisting of —CH2Z3, —NHCOR5, —CONHR6, —OCOR7, —COOR8 and —OR9, and where Z1, Z2, and Z3 are selected from the group consisting of fluoro, chloro, bromo, iodo, hydroxyl, toluene-4-sulfonyloxy and methylsulfonyloxy. R1, R2, R3 and R4 are independently from each other selected from the group consisting of linear or branched C1-C30 alkyl, a linear or branched C2-C30 alkenyl, a linear or branched C2-C30 alkynyl, sulfo, nitro, amino, hydroxy, oligo(C2 to C4-alkylene glycol), —NHCOR5, —CONHR6, —OCOR7, —COOR8 and —OR. R5, R6, R7, R8 and R9 are selected from the group consisting of a linear or branched C1-C30 alkyl, a linear or branched C2-C30 alkenyl and a linear or branched C2-C30 alkynyl.