نتایج جستجو برای: graft copolymer

تعداد نتایج: 95531  

Journal: :Frontiers in Veterinary Science 2023

Quercetin (QR) is a naturally occurring flavonoid organic compound that has poor solubility in water and highly unstable alkaline conditions, resulting limited absorption poultry. Consequently, our experiment, QR was employed as model compound, encapsulated within the caffeic acid graft chitosan copolymer (CA-g-CS) self-assembled micelles to enhance its solubility, stability exhibit synergistic...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی پلیمر 1386

پلیمریزاسیون درجای (in-situ) منومر استایرن در حضور لاستیک پلی بوتادی ان با جرم مولکولی پایین و گروه های هیدروکسیل انتهایی به تشکیل کوپلیمر پیوندی با ساختار مایسلی غیر مقاوم منجر شد. از طرف دیگر, استفاده از پلی بوتادی ان تهیه شده به روش رادیکالی به دلیل کمبود ریز ساختار 2و1 وینیل به عنوان مرکز مستعد پیوند شاخه های پلی استایرن, با مشکل عدم دستیابی به ساختار مناسب وتامین مقاومت به ضربه مواجه خواهد...

Journal: :Archives of otolaryngology--head & neck surgery 2004
Syed H Kamil Roland D Eavey Martin P Vacanti Charles A Vacanti Christopher J Hartnick

OBJECTIVE To evaluate the feasibility of using tissue-engineered cartilage for laryngotracheal reconstruction in the pig model. DESIGN Auricular cartilage was harvested from 3 young swine. The cartilage was digested, processed, and suspended and a cell culture was obtained. The cells were then suspended in 3 mL of a 30% solution of a biodegradable polymer (Pluronic F-127) (polyethylene oxide/...

Journal: :Medžiagotyra 2023

As an important part of cultural heritage, paper relics have historical, scientific and humanistic values. However, a large number are suffering from aging, mildew, yellowing, cracks, embrittlement other threats, or even completely damaged. To enhance the strength prolong life relics, novel CMC-acrylate-OVPOSS graft copolymer was synthesized with carboxymethyl cellulose (CMC), methyl methacryla...

2009
Kulandaivelu Sivanandan Tirtha Chatterjee Neil Treat Edward J. Kramer Craig J. Hawker

A strategy for the fabrication of high surface area poly(3-hexylthiophene) thin films by removal of nanoscale domains formed from graft copolymers is presented. This approach relies on the synthesis and characterization of cleavable graft copolymers based on regioregular poly(3-hexylthiophene) (rr-P3HT) main chain and sacrificial poly(styrene) side chains. An alkoxyamine initiator based on 2,2,...

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