Thermo-soften = no cross links (remeltable); Thermo-set = cross-linked hard set (not remeltable).
No cross links β remelt (soft); Cross links β hard set (resist heat).
5 nutrients + water: proteins/carbs/fats/minerals/vitamins, and hydrate before, during, after.
Ban needs 2 of 3: better performance + health threat + spirit violation.
Timeline anchor: 1928 first ban; 1998 scandal β WADA next year; drugs: stimulants, EPO/HGH, blood doping.
Urine + mass spectrometry = fingerprints; Blood testing = EPO, not transfusions.
Before/during/after + data: wearables for health, analysis software for technique/tactics, therapy for recovery.
Exposure pillars: Shutter freezes, Aperture controls light, ISO boosts sensitivity (noise), Stabilization fights shake.
Thermosoftening vs thermosetting plastics
| Property | Thermosoftening | Thermosetting |
|---|---|---|
| Cross links | No cross links | Cross-linked set behavior implied by irreversible setting |
| Heating behavior | Melt and can be reshaped | Sets hard and cannot be remelted |
| Shape at high heat | Not described as maintaining shape | Maintains shape at high temperatures |
| Typical examples | Bases for shoes | Billiard balls, safety helmets |
Take a 8-question practice quiz on Fundamentals of Sports Materials and Performance, with every answer explained.
1. What is polymerization?
2. How do thermosoftening plastics behave when heated?
Memorize the key concepts of Fundamentals of Sports Materials and Performance with 16 flashcards.
Polymer β definition?
Large molecule made from monomers.
Monomer β role?
Small unit that forms polymers.
Polymerization β process?
Chemical bonding of monomers into polymers.
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