Abstract: An apparatus for testing a microduct includes an outlet configured to connect to a first end of the microduct, an inlet configured to connect to a second end of the microduct, an object sized to flow through the microduct in response to a sufficient air pressure, and a test passage coupled to the outlet and configured to receive the object. The apparatus also includes a testing plate having a hole sized to receive the object, a container coupled to the inlet and configured to receive the object from the microduct via the inlet, a pneumatic device configured to provide the sufficient air pressure, and a controller coupled to the first sensor. The controller is configured to, upon receiving the first signal from the first sensor, provide a first indication. If the first signal is not received within a specified time period, the controller is configured to provide a second indication.

Abstract: Amine-terminated hyperbranched quinoxaline-amide polymers having repeating units of the formula: are useful to initiate bismaleimide polymerization and to increase the toughness of thermosets such as BMI and epoxies.