Скачать или смотреть Polymers - ADP4 - Molecular Structure Makes Plastics Rigid & Elastomers Flexible at Room Temperature

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Plastic and elastomers are rigid and flexible at room temperature, respectively, and the video explains why this is true, from their specific chemistries and by showing the repeat units of Polystyrene (PS), Polyethylene (PE), Polyphenylene Sulfide (PPS), and Natural Rubber (NR).

Plastics are a subset of Polymers & are rigid due to aromatic and simple structures which can promote crystallinity, while elastomers are flexible due to linear and non uniform structures that limit the ability to crystallize in the unstrained state. Molecular structure makes plastics rigid and elastomers flexible at room temperature.

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▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬

00:00 Chemical Differences of Plastics & Elastomers
00:43 Chemistry for Rigid Plastics & Flexible Elastomers
01:16 Crystalline Plastics
01:45 Amorphous Natural Rubber

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