news Pentamethyl Diethylenetriamine (PC-5)’s Role in Improving Impact Resistance of Polyurethane Elastomers Pentamethyl Diethylenetriamine (PC-5): A Key Component in Enhancing Impact Resistance of Polyurethan... 04/0723Pentamethyl Diethylenetriamine (PC-5)’s Role in Improving Impact Resistance of Polyurethane Elastomers