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FIBER TECHNOLOGY (2) answer(s).
 
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1
ID:   130739


Development of an advanced engineering polymer from the modific / Pramanik, N. K; Haldar, R. S; Niyogi, U. K; Alam, M. S   Journal Article
Pramanik, N. K Journal Article
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Publication 2014.
Summary/Abstract When Nylon 66 was irradiated by an optimum dose of e-beam in presence of polyurethane as impact modifierin combination with triallyl is ocyanurate as cross-linker, a superior performance was observed for the irradiated nylon 66. Significant improvement of properties, such as hardness, tensile strength, flexural modulus and impact strength was obtained on radiation processing of nylon 66 by e-beam. More interestingly, percent water absorptionof such irradiated nylon 66 was reduced substantially. Improvement of mechanical properties and reduction of water absorption of irradiated nylon 66 were due to the cross-linking of the polymer system. Increase of cross-linkingwith dose of e-beam was verified by the increased gel content at higher doses. Irradiated nylon 66 showed betterdimensional stability than those achieved with pristine nylon 66. The increase in dimensional stability may beattributed to reduction in crystallinity with increasing dose of e-beam as revealed by DSC studies.
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2
ID:   130737


Sponge gourd (Luffa Cylindrica) reinforced polyester composites: preparation and properties / Tanobe, Valcineide O.A; Sahagun, Thais H.S. Flores; Amico, Sandro C; Muniz, Graciela I.B, Satyanarayana, K. G   Journal Article
Tanobe, Valcineide O.A Journal Article
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Publication 2014.
Summary/Abstract Increasing environmental concern along with the drive to find substitutes for synthetic fibers and value added applications for low cost and renewable plant fibers have led to the development of composites based on biomaterials. One of the drawbacks encountered in such exercise is the lack of adhesion between the incorporated plant fibers and synthetic polymeric matrices. Such drawback can be reduced by appropriate treatment of fibers. This paper describes the chemical treatments used on sponge gourd (Luffa cylindrica) fibers of Brazil to prepare their composites with polyester resin. Production of short fiber-polymer composite as well as mat-polyester composites is presented here. Characterization of the composites in respect of evaluation of density, water absorption, thermalstability, tensile properties and impact strength were made and the results are discussed. Observed impact strengthand tensile properties are discussed based on the fractographic studies of the composites.
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