Branched polyarylene sulfide resin, method for manufacturing same and use as polymer modifier
AssigneeKureha Corporation
InventorsAkihiro KONNO, Yasuhiro SUZUKI
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Abstract
Disclosed is a branched polyarylene sulfide resin including an —S— substituent group with a cleaved disulfide compound which has a melt viscosity as measured at a halogen content of 4,000 ppm or less, a temperature of 330° C. and a shear rate of 2 sec−1 of 1.0×104 to 50.0×104 Pa·s and a melt viscoelasticity tan δ as measured at a temperature of 310° C. and an angular velocity of 1 rad/sec of 0.1 to 0.6.
Claims10
A branched polyarylene sulfide resin comprising an —S— substituent group with a cleaved disulfide compound, wherein the resin has the following characteristics i to iii:
- i) a halogen content of 4,000 ppm or less;
- ii) a melt viscosity as measured at a temperature of 330° C. and a shear rate of 2 sec−1 of 1.0×104 to 50.0×104 Pa·s;
- and
- iii) a melt viscoelasticity tan δ as measured at a temperature of 310° C. and an angular velocity of 1 rad/sec of 0.1 to 0.6.
A method for manufacturing a branched polyarylene sulfide resin including an —S— substituent group with a cleaved disulfide compound that polymerizes a sulfur source with a dihalo aromatic compound in an organic amide solvent in the presence of a disulfide compound and a polyhalo aromatic compound having three or more halogen substituent groups in the molecule, the method comprising the steps of:
- performing a polymerization reaction of a sulfur source with a dihalo aromatic compound in an organic amide solvent using the dihalo aromatic compound in an amount of from 0.95 to 1.02 mol per mol of sulfur source;
- adding a disulfide compound in an amount of from 0.001 to 0.03 mol per mol of sulfur source during the time interval between a stage when the conversion ratio of the dihalo aromatic compound is 0% and a stage when a polyhalo aromatic compound is added and reacting the mixture;
- adding a polyhalo aromatic compound, in an amount of from 0.002 to 0.06 mol per mol of sulfur source and an amount of from 0.2 to 12 mol per mol of disulfide compound, to the polymerization reaction mixture at a stage when the conversion ratio of the dihalo aromatic compound reaches 80% or more;
- and
- performing a phase separation polymerization reaction in the presence of a phase separation agent.
Dependencies are inferred from the claim text.