Aromatic Amide Flow Aid for Liquid Crystalline Polymers
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Solution Overview
Problem
High performance polymers, such as thermotropic liquid crystalline polymers, face challenges in meeting the increased molding demands of intricate part designs without compromising the final product's performance, particularly in terms of flow capacity and dimensional stability.
Innovation Solution
An aromatic amide compound with a specific general formula is developed, which can be used as a flow aid for thermotropic liquid crystalline polymers by altering intermolecular polymer chain interactions, thereby reducing viscosity and minimizing stress-related issues during molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high performance polymers are used to meet molding demands of intricate part designs, then flow capacity is improved, but dimensional stability deteriorates due to molded-in stress and warpage
Solution Approach 1:
The aromatic amide compound acts as an intermediary substance that modifies the polymer matrix properties. It mediates between the conflicting requirements of high flow capacity and dimensional stability by altering intermolecular polymer chain interactions, allowing the polymer to flow better during molding while maintaining dimensional stability in the final part.
Solution Approach 2:
The invention changes the physical and chemical parameters of the polymer system by introducing the aromatic amide compound. This compound modifies the viscosity characteristics and stress relaxation behavior of the polymer matrix, enabling the material to achieve both high flow during injection and low warpage in the molded part.
2Speed
If polymer flow is enhanced to fill complex parts at fast rates, then molding speed is improved, but molded-in stress increases causing warpage
Solution Approach 1:
The aromatic amide compound serves as a mediator that reduces molded-in stress during high-speed molding. It interacts with polymer chains to minimize stress accumulation during rapid filling, thereby reducing warpage while maintaining high molding speeds.
Solution Approach 2:
The compound changes the stress relaxation parameters of the polymer matrix, allowing faster molding cycles without proportionally increasing molded-in stress. This enables high-speed production while controlling warpage through modified viscoelastic properties.
3Productivity
If aromatic amide compound is added to reduce viscosity, then flow capacity is improved, but mechanical properties may be adversely affected
Solution Approach 1:
The invention optimizes the concentration and molecular structure parameters of the aromatic amide compound to achieve the desired balance. By carefully controlling these parameters, the compound reduces viscosity sufficiently for good flow while maintaining adequate mechanical properties in the final molded part.
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 aromatic amide compound effectively lowers the viscosity of the polymer matrix under shear, enhancing the flow and dimensional stability of molded parts without adversely affecting the mechanical properties of the polymer.
Implementation Method 1
altering intermolecular polymer chain interactions, thereby reducing viscosity and minimizing stress-related issues during molding
Data Source
AI summary
An aromatic amide compound having the following general formula (I) is provided:wherein,X1 and X2 are independently C(O)HN or NHC(O);G1, G2 and G3 are independently hydrogen, C(O)HN-phenyl, or NHC(O)-phenyl, wherein at least one of G1, G2 and G3 is C(O)HN-phenyl or NHC(O)-phenyl;Q1, Q2, and Q3 are independently hydrogen, C(O)HN-phenyl, or NHC(O)-phenyl, wherein at least one of Q1, Q2, and Q3 is C(O)HN-phenyl or NHC(O)-phenyl;R5 is halo, haloalkyl, alkyl, alkenyl, aryl, heteroaryl, cycloalkyl, or heterocyclyl; andm is from 0 to 4.