SHPP GLOBAL TECHNOLOGIES B.V. (20240317996). Branched Polycarbonate Copolymer Compositions Having Improved Toughness Properties and Methods for Evaluating the Same simplified abstract
Branched Polycarbonate Copolymer Compositions Having Improved Toughness Properties and Methods for Evaluating the Same
Organization Name
Inventor(s)
Manojkumar Chellamuthu of Mt. Vernon IN (US)
James A. Mahood of Mt. Vernon IN (US)
Christopher Luke Hein of Mt. Vernon IN (US)
Branched Polycarbonate Copolymer Compositions Having Improved Toughness Properties and Methods for Evaluating the Same - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240317996 titled 'Branched Polycarbonate Copolymer Compositions Having Improved Toughness Properties and Methods for Evaluating the Same
The patent application describes a thermoplastic composition consisting of two branched polycarbonate copolymers, each end-capped with 4-hydroxybenzonitrile (4-hbn) with different molecular weights.
- The first branched polycarbonate copolymer has a molecular weight m1, which is lower than the molecular weight m2 of the second branched polycarbonate copolymer.
- Methods for determining the entanglement molecular weight (Me) of a polycarbonate copolymer involve using a small amplitude oscillatory rheology process to analyze the sample's phase angle (∂) versus complex modulus (g*) at a specified temperature.
- The Me of the sample is calculated based on the determined plateau modulus (g) from the minima of the phase angle (∂).
Potential Applications: - This thermoplastic composition could be used in the manufacturing of various plastic products requiring specific mechanical properties.
Problems Solved: - The patent addresses the need for accurately determining the entanglement molecular weight of polycarbonate copolymers, which is crucial for optimizing their performance in different applications.
Benefits: - By understanding the Me of polycarbonate copolymers, manufacturers can tailor their properties to meet the requirements of specific end-uses, leading to enhanced product performance.
Commercial Applications: - The thermoplastic composition could find applications in industries such as automotive, electronics, and consumer goods for producing high-performance plastic components.
Questions about the technology: 1. How does the molecular weight difference between the two branched polycarbonate copolymers impact the overall properties of the thermoplastic composition? 2. What are the implications of accurately determining the entanglement molecular weight of polycarbonate copolymers in terms of product development and performance optimization?
Original Abstract Submitted
a thermoplastic composition includes: a first branched polycarbonate copolymer end-capped with 4-hydroxybenzonitrile (4-hbn) having a molecular weight m1; and a second branched polycarbonate copolymer end-capped with 4-hbn having a molecular weight m2. m1 is less than m2. methods for determining entanglement molecular weight (me) of a polycarbonate copolymer include: preparing a sample of a branched polycarbonate copolymer including a 1,1,1-tris-hydroxy-phenylethane (thpe) branching agent and that is end-capped with 4-hbn; determining phase angle (∂) versus complex modulus (g*) of the sample using a small amplitude oscillatory rheology process at a specified temperature; determining a minima in the ∂ of the sample; determining a plateau modulus (g) of the sample from the determined minima of ∂; and calculating the me of the sample from the g.
