公开(公告)号：US20240317996A1

公开(公告)日：2024-09-26

申请号：US18609702

申请日：2024-03-19

Applicant: SHPP GLOBAL TECHNOLOGIES B.V.

Inventor： Manojkumar CHELLAMUTHU ,  James A. MAHOOD ,  Christopher Luke HEIN

IPC: C08L69/00 ,  C08K5/00

CPC classification number: C08L69/00 ,  C08K5/0066 ,  C08L2201/02 ,  C08L2201/10 ,  C08L2203/20 ,  C08L2205/025 ,  C08L2207/04

Abstract: 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 (GN) of the sample from the determined minima of ∂; and calculating the Me of the sample from the GN.