Improving Photovoltaic Module Lifetimes via Creation of Novel, Low Coefficient of Thermal Expansion (CTE) Backsheet Polymers
Invited talk to ACS Southwest Regional Meeting
Engineering topics
Publications and source records attributed to Dugger, Jason Wade.
Invited talk to ACS Southwest Regional Meeting
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The cis- form of diaminodibenzocyclooctane (DADBCO, C 16 H 18 N 2 ) is of interest as a negative coefficient of thermal expansion (CTE) material. The crystal structure was determined through single-crystal X-ray diffraction at 100 K and is presented herein.
This report describes an adhesively bonded, Asymmetric Double Cantilever Beam (ADCB) fracture specimen that has been expressly developed to measure the toughness of an alumina (Al 2 0 3 )/epoxy interface. The measured interfacial fracture toughness quantifies resistance to crack growth along an interface with the stipulation that crack-tip yielding is limited and localized to the crack-tip. An ADCB specimen is a variant of the well-known double cantilever beam specimen, but in the ADCB specimen the two beams have different bending stiffnesses. This report begins with a brief overview of how crack-tip mode mixity (i.e., a measure of shear-to- normal stress at the crack-tip) is a distinguishing feature of interfacial fracture. Which is then followed by a detailed description of relevant design, fabrication, testing, and associated data analysis techniques. The report then concludes by presenting illustrative results that compare the measured interfacial toughness of an alumina/epoxy interface when the alumina is silane-coated and when the alumina is not silane coated. This page left blank