Results 11 to 20 of about 771 (109)
Applied Engineering LettersVarious types of tribotechnical polymeric materials are widely used for metal-polymer (MP) gears to ensure their reliable operation in dry sliding friction conditions.
Myron Czerniec, Jerzy Czerniec
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Applied SciencesPredictive assessments of the performance characteristics of metal-polymer (MP) plain bearings at the design stage are necessary and important for engineering practice. They include assessments of bearing capacity, linear wear of the bushing, and bearing
Myron Czerniec +2 more
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Aluminium-Polyethylene Terephthalate Sensor [PDF]
, 2019 This chapter explains the fabrication and implementation of the second type of sensor prototype developed from Aluminium and Polyethylene Terephthalate (PET). Metallized PET films were laser ablated in a single-step process to develop the sensor patches. These sensors were then employed for tactile sensing purposes.
Nag, Anindya +2 more
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Biocatalytic recycling of polyethylene terephthalate plastic [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020 The global production of plastics made from non-renewable fossil feedstocks has grown more than 20-fold since 1964. While more than eight billion tons of plastics have been produced until today, only a small fraction is currently collected for recycling and large amounts of plastic waste are ending up in landfills and in the oceans. Pollution caused by
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Polyethylene Terephthalate and Endocrine Disruptors
Environmental Health Perspectives, 2010 In the commentary “Polyethylene Terephthalate May Yield Endocrine Disruptors,” Sax (2010) theorized that bottles made of polyethylene terephthalate (PET) might leach phthalate ester plasticizers and/or antimony to produce endocrine-disrupting effects. On behalf of the North American producers of PET resin, I have the following comments and corrections.
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Heating Rate Sensitive Polyethylene Terephthalate
Macromolecular Rapid CommunicationsAbstractSmart materials react to external triggers by changing size, color, mechanical properties, or permeability. The next generation of smart materials will be able to not only recognize and react to external triggers but also to their dynamics.
Robert David Ludwig Jerusalem +4 more
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Polyethylene Terephthalate: Sax Responds
Environmental Health Perspectives, 2010 In his letter Vasami reminds readers that phthalates are not used in the manufacture of PET. Indeed, I emphasized precisely this point in my commentary (Sax 2010), for example, when I stated that “phthalates are not used as substrates or precursors in the manufacture of PET.” Vasami also asserts that “it is not chemically plausible for PET to produce ...
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Polyethylene Isophthalate Terephthalate Copolymer
Kobunshi Kagaku, 1957 テレフタル酸ジメチル, イソフタル酸ジメチルおよびエチレングリコールよりPbOを触媒として溶融重合によって, 種々の組成のポリエチレンイソフタレートテレフタレート共重合体を合成した。これら共重合体はいずれも良好な曳糸性を有し, 粘度数が大きいものでは冷延伸も容易である。エチレンイソフタレートが20%以下のものは結晶性を有し, 加熱や延伸などによってこれらを結晶化させることが可能である。延伸熱処理糸のX線図によれば, 結晶部分はエチレンテレフタレートのみよりなり, エチレンイソフタレートは非晶部分に存在するものと考えられる。
Yasuyuki Numata, Masao Takahashi
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Crystallization of Polyethylene Terephthalate
Kobunshi Kagaku, 1969 等温結晶化したポリエチレンテレフタレートの球晶構造を小角光散乱, 光学顕微鏡および密度測定により検討した。試料には結晶化温度および時間を変えたものを用いた。結晶化温度110℃から140℃までの領域では通常の光散乱理論により説明される散乱像を得たが, 140℃以上の領域では四つ葉のクローバー像で代表される典型的な球晶による散乱の他に散漫な散乱や, あるいは新しい散乱像も見られた。結晶化条件, 配向度あるいは分子量およびジエチレングリコール含有率といったポリマー特性によっても散乱像は影響を受けるがポリエチレンテレフタレート球晶の構造は, その散乱像から理解できる。
Naonori Yoshioka, Hiroshi Sato
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A general esterolysis strategy for upcycling waste polyesters into high-value esters. [PDF]
Nat CommunZhang M, Yu Y, Han B, Mei Q.
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