Chemical aspects of polymer recycling

نویسندگان

چکیده

Since recycling of polymers is a preferred means reducing unwanted wastes and land-filling activity, recovering monomers or other materials economic value, tertiary methods (chemical recycling) have been critically reviewed, giving special attention, in each case, to the chemical basis particular pathway its potential applicability. Recycling issues widely used commodity – polyesters, polyamides, polyurethanes, epoxies, poly(vinyl chloride), polystyrene, polyolefins discussed individually, attention both conventional unconventional perceived high potential, such as enzymatic degradation, ionic liquids mediation, microwave irradiation, treatment super critical well fluids. In addition, novel emerging undergoing greater study at present, cross-alkane metathesis (CAM), tandem hydrogenolysis/aromatization, vitrimer-based recycling, dynamic covalent bonding are also highlighted.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Chemical Recycling of Polymer Materials

After the first life cycle of plastics various recycling processes are available for further utilization of these valuable materials. For an ecologically and economically satisfying solution the most suitable process has to be chosen. In chemical recycling polymers are degraded to basic chemical substances which can be reused in the petrochemical industry. For soiled waste plastics or waste pla...

متن کامل

chemical recycling of polycarbonate waste using conventional heating and microwave assisted method

پلی کربنات یکی از پلاستیکهای مهمی است که به صورت گسترده در تولید لوحهای فشرده، قطعات رایانه، مواد ساختمانی و غیره مورد استفاده قرار می گیرد. این پلیمر بصورت عمده از تراکم مونومر بیس فنولa (bpa) و کربنیل کلرید یا دی متیل کربنات ها بدست می آید. در سالهای اخیر بازیافت شیمیایی پلی کربنات بیشتر مورد توجه بوده است. بازیافت شیمیایی پلی کربنات برای بدست آوردن مواد اولیه آن با روشهای متفاوتی مانند تجزی...

The Economic Aspects of Recycling

Over the last years, environmental issues have gained remarkable significance as a result of the high level of environmental awareness in society and also due to the widening of the scope of the environmental legislation and regulation. One of the major concerns within this context is the high rate of packaging waste generation. Nowadays there is a variety of technologies to deal with waste tre...

متن کامل

Polymer recycling: opportunities and limitations.

The disposal of polymer solid waste by means other than landfilling is necessary. The various approaches-source reduction, incineration, degradation, composting, and recycling-all have their roles and must be employed in an integrated manner. Where appropriate, recycling has ecological advantages, but its application is dependent upon the feasibility of collection, sorting, and/or compatibiliza...

متن کامل

Chemical Recycling of Poly Ethylene Terephthalate Wastes

Chemical recycling of Polyethylene terephthalate, PET, wastage has been investigated in this study. The aim of this work is recovery of terephthalic acid and ethylene glycols from PET waste. This process has been done in two stages. At the first stage, reaction between PET waste and sodium hydroxide for production of ethylene glycol and sodium terephthalate solution carried out in a stainless s...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Advanced industrial and engineering polymer research

سال: 2021

ISSN: ['2542-5048']

DOI: https://doi.org/10.1016/j.aiepr.2021.06.002