Results 181 to 190 of about 1,041,248 (230)

Catalytic deconstruction of waste polyethylene with ethylene to form propylene

Science, 2022
The conversion of polyolefins to monomers would create a valuable carbon feedstock from the largest fraction of waste plastic. However, breakdown of the main chains in these polymers requires the cleavage of carbon–carbon bonds that tend to resist ...
Richard J. Conk, Steven Hanna, Jake X. Shi, Ji Yang, Nicodemo R. Ciccia, Liang Qi, Brandon J. Bloomer, Steffen Heuvel, Tyler Wills, Ji Su, A. Bell, J. Hartwig   +11 more
semanticscholar   +1 more source

Coking-Resistant Polyethylene Upcycling Modulated by Zeolite Micropore Diffusion.

Journal of the American Chemical Society, 2022
Although the mass production of synthetic plastics has transformed human lives, it has resulted in waste accumulation on the earth. Here, we report a low-temperature conversion of polyethylene into olefins. By mixing the polyethylene feed with rationally
Jindi Duan, Wei Chen, Chengtao Wang, Liang Wang, Zhiqiang Liu, Xianfeng Yi, Wei Fang, Hai Wang, Han Wei, Shaodan Xu, Yiwen Yang, Qiwei Yang, Zongbi Bao, Zhiguo Zhang, Qilong Ren, Hangying Zhou, Xuedi Qin, Anmin Zheng, F. Xiao   +18 more
semanticscholar   +1 more source

Polyethylene-polyethylene microfibrillar composites

Journal of Materials Science, 1993
Solid-state drawing of melt-crystallized, or gel(solution)-crystallized, polyethylene (PE) is well established as a means of producing high modulus high-strength fibres. Here, an alternative route, based on melt-processing, is reviewed and its merits are assessed.
Bashir, Z, Odell, JA
openaire   +1 more source

Polyethylene/deutero-polyethylene phase behaviour

Polymer, 1985
Abstract A study of the phase behaviour of polyethylene/deuterated polyethylene (PEH/PED) has been carried out to address the question of phase segregation. The phase diagram has been determined by differential scanning calorimetry on carefully co-crystallized mixtures of PEH and PED that are of essentially the same molecular weight.
A.D. English, P. Smith, D.E. Axelson
openaire   +1 more source

Polyethylene terephthalate (PET) in the packaging industry

, 2020
Polyethylene terephthalate (PET) is the third most widely diffused polymer exploited in the packaging industry, monopolizing the bottles market for beverages, and covering almost the 16% of the European plastic consumption in the packaging industry. Even
R. Nisticò
semanticscholar   +1 more source

Polyethylene microplastics trigger cell apoptosis and inflammation via inducing oxidative stress and activation of the NLRP3 inflammasome in carp gills.

Fish and Shellfish Immunology, 2022
Microplastics cause varying degrees of damage to aquatic organisms. Exposure to microplastics contaminated water, the gills are among the first tissues, after the skin, to be affected by microplastics.
Jing-wen Cao, Ran Xu, Fuhan Wang, Yuan-Wei Geng, Tianchao Xu, Mengran Zhu, Hongli Lv, Shiwen Xu, Meng-yao Guo   +8 more
semanticscholar   +1 more source

Polyethylene microplastics affect the distribution of gut microbiota and inflammation development in mice.

Chemosphere, 2019
Environmental pollution caused by plastics has become a public health problem. However, the effect of microplastics on gut microbiota, inflammation development and their underlying mechanisms are not well characterized.
Boqing Li, Yunfei Ding, Xue Cheng, Dandan Sheng, Zheng Xu, Qianyu Rong, Yulong Wu, Huilin Zhao, Xiaofei Ji, Ying Zhang   +9 more
semanticscholar   +1 more source

Polyethylene Glycol Induced Systemic Allergic Reactions (Anaphylaxis).

Journal of Allergy and Clinical Immunology: In Practice, 2020
Polyethylene glycols (PEG) or macrogols are hydrophilic polymers found in everyday products such as foods, cosmetics and medications. We present five cases of confirmed PEG allergy, which to our knowledge is the largest case series to date.
P. Sellaturay, S. Nasser, P. Ewan
semanticscholar   +1 more source