مقاله انگلیسی رایگان در مورد پلی استرهای عقب مانده شعله ای از افزودنی های فسفر – الزویر ۲۰۱۸

مقاله انگلیسی رایگان در مورد پلی استرهای عقب مانده شعله ای از افزودنی های فسفر – الزویر ۲۰۱۸

 

مشخصات مقاله
ترجمه عنوان مقاله مطالعه جامع در مورد پلی استرهای عقب مانده شعله ای از افزودنی های فسفر
عنوان انگلیسی مقاله Comprehensive study flame retardant polyesters phosphorus additives
انتشار مقاله سال ۲۰۱۸
تعداد صفحات مقاله انگلیسی ۱۳ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله مقاله پژوهشی (Research article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) scopus – master journals – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF) ۳٫۱۹۳ در سال ۲۰۱۷
شاخص H_index ۱۳۰ در سال ۲۰۱۸
شاخص SJR ۱٫۰۴۱ در سال ۲۰۱۸
رشته های مرتبط شیمی
گرایش های مرتبط شیمی پلیمر
نوع ارائه مقاله ژورنال
مجله / کنفرانس تخریب پلیمر و پایداری – Polymer Degradation and Stability
دانشگاه Empa Swiss Federal Laboratories for Materials Science and Technology – Switzerland
کلمات کلیدی پلی استر، DOPO، بازدارنده شعله، رئولوژی، سمی بودن، حرارتی، آتش
کلمات کلیدی انگلیسی Polyesters, DOPO, Flame retardant, Rheology, Toxicity, Thermal, Fire
شناسه دیجیتال – doi
https://doi.org/10.1016/j.polymdegradstab.2018.07.006
کد محصول E9536
وضعیت ترجمه مقاله  ترجمه آماده این مقاله موجود نمیباشد. میتوانید از طریق دکمه پایین سفارش دهید.
دانلود رایگان مقاله دانلود رایگان مقاله انگلیسی
سفارش ترجمه این مقاله سفارش ترجمه این مقاله

 

فهرست مطالب مقاله:
Abstract
۱ Introduction
۲ Experimental section
۳ Results and Discussion
۴ Conclusions
References

بخشی از متن مقاله:
abstract

In this work we have performed a comprehensive study on synthesis, processing, detailed material characterization and preliminary assessment of toxicity of relatively new flame retardant (FR) additives as a key for developing environmentally friendly fire safe polyesters. Two 9,10-dihydro-9-oxa-10- phosphaphenanthrene-10-oxide (DOPO) based FR additives were synthesized using principles of green chemistry and incorporated via thermal processing in high temperature polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). The green synthesis strategies included (i) the use of N-chlorosuccinimide as a sustainable chlorinating agent for DOPO and (ii) a solvent and catalyst free microwave-assisted synthesis. Atomistic molecular dynamics (MD) simulations were employed in order to calculate the solubility parameters of these additives so as to estimate their compatibility in the polyesters. Detailed rheological measurements of the polyester/FR blends were carried out and the results indicated a clear difference in all three additives tested. Based on these analyses, 6H-dibenz[c,e][1,2] oxaphosphorin,6-[(1-oxido-2,6,7-trioxa-1-phosphabicyclo[2.2.2]oct-4-yl)methoxy]-, 6-oxide (DOPOPEPA) exhibited the highest compatibility with both polyesters and their blends and showed the highest thermal-oxidative stability guaranteeing stable and steady processing at high temperatures. All polyester/FR formulations exhibited higher flame retardancy compared to the virgin polyesters in the small scale fire tests. The FR additives were evaluated for their potential toxicity using a well-established in vitro platform. Our results indicate no acute cytotoxic potential for all FRs analyzed in two different cell types (the human lung epithelial cell line A549 and macrophages derived from the monocytic cell line THP-1) and under the chosen experimental conditions.

Introduction

There is increasing demand for the development of environmental friendly fire safe materials which fulfill both ecological and commercial requirements. In addition, these materials need to be fully characterized for their physical and chemical properties and their ease of processability for eventual industrial exploitation. Like in case of other additives, it is important that a flame retardant (FR) additive do not interfere with steady melt processing in typical polymer extruders. Therefore, it is required that the melt properties of the polymer/FR blends do not change significantly during the processing. Most common polymers are not suitable for fire safe applications and are rendered flame retardant by incorporating an FR additive in the polymer bulk or via coating on the surface. Incorporating FR additive in the bulk via thermal processing is relatively simple, economical and more durable to environmental influences. The key to reducing waste and improving sustainability of functional materials is to develop additives via green chemistry strategy. There are 12 important principles involved in green chemistry, for example, the chemical should be non-toxic, toxic raw materials and solvents should be avoided, high atom economy and the use of renewable feedstock [1]. Some halogenated flame retardants are prohibited [2] due the concerns regarding their toxicity [3]. In the last decades the impetus has shifted to the development of environmentally friendly flame retardants (FRs). Among the many classes of FR additives, new phosphorus containing FRs [4e7] are considered potential replacements for the toxic FRs [3]. More recently some phosphorus based FRs have also come under scrutiny of various regulatory and environmental agencies. Some phosphorus based FRs have been found to be toxic and are currently being phased out or their usage restricted [8e12].

برچسب ها

ثبت دیدگاه