Soluble Polyfunctional Vinyl Aromatic Copolymer Dielectric Properties
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing soluble polyfunctional vinyl aromatic copolymers lack sufficient dielectric properties and thermal oxidative degradation resistance, particularly at high temperatures, making them unsuitable for advanced electronic applications where high-frequency electrical characteristics and thermo-mechanical performance are required.
Innovation Solution
A novel soluble polyfunctional vinyl aromatic copolymer is developed, comprising structural units from divinyl aromatic compounds, styrene, and a monovinyl aromatic compound, with specific terminal groups and molecular weight distribution, produced through polymerization in the presence of a Lewis acid catalyst and a Lewis base compound, resulting in improved heat resistance, dielectric properties, and wet heat reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional soluble polyfunctional vinyl aromatic copolymers are used, then solvent solubility and processability are excellent, but dielectric properties and thermal oxidative degradation resistance are insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters of the copolymer by introducing specific monomer components (divinyl aromatic compound, styrene, and other monovinyl aromatic compound) in controlled ratios and adjusting molecular weight distribution (Mw/Mn ≤ 100), thereby improving dielectric properties while maintaining processability through optimized polymer architecture
Solution Approach 2:
The patent creates a composite polymer structure by combining multiple monomer components (divinyl aromatic compound, styrene, and other monovinyl aromatic compound) in a copolymer framework, where each component contributes specific properties: divinyl aromatic compound provides crosslinking capability for heat resistance, styrene contributes low dielectric constant, and other monovinyl aromatic compounds enhance solubility and processability
2Reliability
If conventional soluble polyfunctional vinyl aromatic copolymers are used, then polymerization can be achieved, but resistance to thermal oxidative degradation at high temperatures is insufficient
Solution Approach 1:
The patent optimizes the molecular weight distribution parameter (Mw/Mn ≤ 100) and monomer composition ratios to enhance thermal stability. The controlled polymerization conditions and specific structural units introduced through parameter optimization enable the copolymer to resist thermal oxidative degradation at elevated temperatures while maintaining appropriate heat resistance
Solution Approach 2:
The patent employs a Lewis acid catalyst and Lewis base compound as intermediary substances during polymerization to control the formation of stable polymer chains with optimized structure. These intermediaries facilitate the creation of a polymer architecture that inherently resists thermal oxidative degradation, acting as protective structural elements during high-temperature service
3Productivity
If soluble polyfunctional vinyl aromatic copolymers with broad molecular weight distribution are produced, then polymerization efficiency is high, but dielectric properties and thermal stability are compromised
Solution Approach 1:
The patent严格控制 the molecular weight distribution parameter (Mw/Mn ≤ 100) and monomer feed ratios during polymerization. By optimizing these parameters, the process achieves high productivity through efficient polymerization while producing a copolymer with uniform structure that exhibits superior dielectric properties and thermal stability
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 exhibits enhanced heat resistance, compatibility, and resistance to thermal oxidative degradation, achieving high-level dielectric properties and improved processability, making it suitable for advanced electronic applications.
Implementation Method 1
a soluble polyfunctional vinyl aromatic copolymer that is obtained through polymerization of a divinyl aromatic compound and a monovinyl aromatic compound
Implementation Method 2
in the presence of a Lewis acid catalyst and an initiator of specific structure
Data Source
AI summary
A novel soluble polyfunctional vinyl aromatic copolymer capable of yielding a cured product or molded body having improved heat resistance, compatibility, dielectric properties, wet heat reliability and resistance to thermal oxidative degradation. Disclosed herein is a soluble polyfunctional vinyl aromatic copolymer containing structural units derived from a divinyl aromatic compound (a), styrene (b), and a monovinyl aromatic compound (c) other than styrene. The copolymer includes structural units made up of an unsaturated hydrocarbon group represented by Formula (a1) and derived from the divinyl aromatic compound (a); and the copolymer includes, at terminals thereof, predetermined amounts of specific terminal groups having a vinyl group or a vinylene bond derived from monomers (a), (b), and (c). Also disclosed is a method for producing the copolymer.