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Microstructure-Driven Self-Sorting of Chemically Indistinguishable Side Chains in Pre-Programmed Alkyl Siloxanes Leading to Amplification of Mechanical Properties |
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| Authors: | Lalit MS Negi Raghavendra Hebbar Tulika Dalavoy Kenrick M Lewis Reema Farhan Rohith V E Bhoje Gowd Nagamalai Vasimalai Alok Sarkar Debarshi Dasgupta |
| Institution: | 1. Momentive Performance Materials (India) Pvt. Ltd., B-3, Sipcot, Oragadam, Sriperumpudur, Kancheepuram, Chennai, Tamil Nadu, 602105 India
Department of Chemistry, B.S. Abdur Rahman Crescent Institute of Science & Technology, Vandalur, Chennai, Tamil Nadu, 600046 India;2. Corporate R&D Center, Momentive Performance Materials Inc., Survey No. 09, Hosur Road, Electronic City (West), Bangalore, 560100 India;3. Momentive Performance Materials Inc., 769 Old Saw Mill River Road, Tarrytown, NY, 10591 USA;4. Materials Science & Technology Division CSIR, National Institute of Interdisciplinary Science & Technology, Trivandrum, Kerala, 695019 India;5. Department of Chemistry, B.S. Abdur Rahman Crescent Institute of Science & Technology, Vandalur, Chennai, Tamil Nadu, 600046 India |
| Abstract: | A unique microstructure-driven self-sorting of chemically indistinguishable side chains in alkyl siloxanes is reported for the first time. The difference in cooperativity among the side alkyl chains caused by the variation in backbone microstructure is the key to drive this self-sorting. The study also reveals that while alkyl chains of random and fully blocked siloxane discriminate each other, the alkyl chains of partially blocked siloxane can form crystals with both polymers resulting in reinforcement of the mechanical property of the blends. |
| Keywords: | microstructure non-covalent self-sorting silicone copolymer X-ray diffraction |