Question

Mode-coupling theory badly overestimates experimental measurements of this quantity by assuming it coincides with the onset of the hopping regime. This quantity is additive for blends of drugs and excipients like trehalose (“TREE-hull-ose”) according to the empirical Gordon–Taylor equation. (-5[1])The operational definition of this quantity, which is calculated from the location of the tan-delta or loss modulus peak in DMA, corresponds to a viscoelastic relaxation time of 100 seconds after a t–T (“T-T”) superposition. Anti-plasticizers stabilize organic films by reducing this quantity; (-5[1])otherwise, it increases asymptotically with molecular weight. The derivative (-5[1])of specific heat (-5[1])is discontinuous (-5[1])at this quantity’s x-value on a DSC trace. (10[1])Free volume expands, and entropy spikes, when a sample is heated past this point, allowing chains (10[1])to be (10[1])more flexible. (10[2]-5[1])For 10 points, (10[2])name this temperature (10[1]-5[1])at which polymers transition (10[1])from a (10[1])rubbery (10[1])state to a (10[1])viscous (10[1])state. (10[2])■END■ (10[2]0[3])

ANSWER: glass transition temperature [or T-sub-g; or glass transition point; prompt on temperature or T until “temperature” is read] (DMA is dynamic mechanical analysis. DSC is differential scanning calorimetry.)
<Chemistry>
= Average correct buzz position

Summary

2023 ACF Nationals04/22/2023Y2181%0%33%128.53

Buzzes

PlayerTeamOpponentBuzz PositionValue
Andrew HannaVanderbilt APenn A37-5
Vittal BhatNorth Carolina AImperial A79-5
Geoffrey ChenCornell AJohns Hopkins A88-5
Andrew SalijNorthwestern AMinnesota B91-5
Nat KuNYU AClaremont A93-5
Geoffrey WuColumbia AWUSTL B10110
Tracy MirkinFlorida AColumbia B11710
David BassVirginia AIowa State A11910
Justin DuffyHarvard AChicago A12110
Daniel YangChicago BUC Berkeley A121-5
Katherine LeiMIT ADuke A12110
Jason HongBrown AStanford A12410
Karan GurazadaTexas AYale A12410
Matt SchiavonePurdue AIndiana A12710
Connor BlakeChicago CFlorida B127-5
Ted GanPenn State AMichigan A13110
Alan XieYale BSouth Carolina A13310
Pranav SivaramOhio State AMcGill A13410
Rohan ShelkeUC Berkeley BRutgers B13710
Maxwell YeMinnesota AMaryland A13810
Vishal KanigicherlaPenn AVanderbilt A13910
Raymond ChenToronto AWUSTL A13910
Shahar SchwartzUC Berkeley AChicago B14010
Benjamin WeinerMinnesota BNorthwestern A1400
Kevin ParkClaremont ANYU A1400
Maximillian NieburJohns Hopkins ACornell A14010
Tiffany ZhouFlorida BChicago C1400