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Chemistry · L5 · Chain Structure → Tg / Crystallinity → Bulk Property

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How the packing route (linear vs branched chains) and the flexibility route (bulky side groups vs a flexible backbone) each lead to a distinct crystallinity or Tg outcome, and from there to bulk mechanical behavior.

by @openstemUpdated Chemistry
Chain structurePacking route orflexibility route?How regular isthe chain packing?High crystallinity XcLow crystallinity XcHow easily doesthe backbone rotate?High TgLow TgStiffer, denser,more opaque, more brittleMore flexible,clearer, lower densityRigid glass persiststo higher temperatureRubbery / softnear room temperatureLinear vs branchedLinear, regularBranched, irregularBackbone flexibilityBulky / rigid side groupsFlexible backbone

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