Synthesis and Characterization of Hydrogen-bonded Main-chain Liquid Crystalline Polymers PDF Download
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Author: Shampa Roychowdhury
Publisher:
ISBN:
Category : Polymer liquid crystals
Languages : en
Pages : 164
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Author: Shampa Roychowdhury
Publisher:
ISBN:
Category : Polymer liquid crystals
Languages : en
Pages : 164
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Book Description
Author: Xiaobin Wang
Publisher:
ISBN:
Category : Crystalline polymers
Languages : en
Pages : 202
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Author: Esra Erbil
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
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Author: Wolfgang Binder
Publisher: Springer
ISBN: 354068588X
Category : Technology & Engineering
Languages : en
Pages : 215
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Book Description
Control of polymeric structure is among the most important endeavours of modern macromolecular science. In particular, tailoring the positioning and strength of intermolecular forces within macromolecules by synthetic me- odsandthusgaining structuralcontrolover the?nalpolymeric materials has become feasible, resulting in the?eld of supramolecular polymer science. - sides other intermolecular forces, hydrogen bonds are unique intermolecular forces enabling the tuning of material properties via self-assembly processes -1 overawiderangeofinteractionstrengthrangingfromseveralkJmol tosev- -1 eraltensofkJmol . Centralfortheformationofthesestructuresareprecursor molecules of small molecular weight (usually lower than 10 000), which can assembleinsolidorsolutiontoaggregatesofde?nedgeometry. Intermolecular hydrogenbondsatde?nedpositionsofthesebuildingblocksaswellastheir- spectivestartinggeometryandtheinitialsizedeterminethemodeofassembly into supramolecular polymers forming network-, rodlike-,?brous-, disclike-, helical-, lamellar- and chainlike architectures. In all cases, weak to strong hydrogen-bondinginteractionscanactasthecentralstructure-directingforce fortheorganizationofpolymerchainsandthusthe?nalmaterials'properties. Theimportantcontributionofhydrogenbondstotheareaofsupramole- lar polymer chemistry is de?nitely outstanding, most of all since the potency of hydrogen-bonding systems has been found to be unique in relation to other supramolecular interactions. Thus the high level of structural diversity of many hydrogen-bonding systems as well as their high level of direction- ity and speci?city in recognition-phenomena is unbeaten in supramolecular chemistry. The realization, that their stability can be tuned over a wide range of binding strength is important for tuning the resulting material prop- ties, ranging from elastomeric to thermoplastic and even highly crosslinked duroplastic structures and networks. On the basis of the thermal reversib- ity, new materials with highly tunable properties can now be prepared, - ing able to change their mechanical and optoelectronic properties with very smallchangesofexternalstimuli. Thusthe?eldofhydrogen-bondedpolymers forms the basis for stimuli responsive and adaptable materials of the future.
Author: Jeremy R. Wolf
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
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Author: Chi-Yang Chao
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
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Author: Ceren Aytaç
Publisher:
ISBN:
Category :
Languages : en
Pages : 51
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Author: Krishnamurthy Sridhar
Publisher:
ISBN:
Category :
Languages : en
Pages : 175
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Author: Sandi Campbell
Publisher:
ISBN:
Category : Crystalline polymers
Languages : en
Pages : 116
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Author: Robin L. McKiernan
Publisher:
ISBN:
Category : Crystalline polymers
Languages : en
Pages : 448
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