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・ "O" Is for Outlaw
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・ "Ode-to-Napoleon" hexachord
・ "Oh Yeah!" Live
・ "Our Contemporary" regional art exhibition (Leningrad, 1975)
・ "P" Is for Peril
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・ "Polish death camp" controversy
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・ "Pussy Cats" Starring the Walkmen
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・ "R" The King (2016 film)
・ "Rags" Ragland
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・ !!Destroy-Oh-Boy!!
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・ !Hero
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・ !T.O.O.H.!
・ !Women Art Revolution


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Thermoplastic polyurethanes : ウィキペディア英語版
Thermoplastic polyurethane

Thermoplastic polyurethane (TPU) is any of a class of polyurethane plastics with many properties, including elasticity, transparency, and resistance to oil, grease and abrasion. Technically, they are thermoplastic elastomers consisting of linear segmented block copolymers composed of hard and soft segments.
==Chemistry ==
TPU are formed by the reaction of: (1) diisocyanates with short-chain diols (so-called chain extenders) and (2) diisocyanates with long-chain diols. The practically unlimited amount of possible combinations producible by varying the structure and/or molecular weight of the three reaction compounds allows for an enormous variety of different TPU. This allows urethane chemists to fine-tune the polymer’s structure to the desired final properties of the material.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Thermoplastic polyurethane」の詳細全文を読む



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