Probing the Melt Miscibility of a Commercial Polyethylene Blend by Small-Angle Light Scattering

Autor:	Ping Peng, Yvonne A. Akpalu
Rok vydání:	2008
Předmět:	Cloud point Materials science Mechanical Engineering Analytical chemistry Polyethylene Flory–Huggins solution theory Neutron scattering Miscibility Industrial and Manufacturing Engineering Light scattering Polyolefin Linear low-density polyethylene chemistry.chemical_compound chemistry Mechanics of Materials Polymer chemistry General Materials Science
Zdroj:	Materials and Manufacturing Processes. 23:269-276
ISSN:	1532-2475 1042-6914
DOI:	10.1080/10426910701860848
Popis:	Small-angle light scattering (SALS) was used to determine the binary interaction parameter χ in a molten blend of linear polyethylene (LPE, M w = 52 kg/mol, PDI = 2.9) and linear low-density polyethylenes (LLDPEs) based on homogeneous ethylene-1-butene copolymers (LLDPE-1, 18.7 mol% butane branches, M w = 58.1 kg/mol, and LLDPE-2, 5.9 mol% butene branches, M w = 70 kg/mol). Traditional cloud point measurements (cooling at 0.5–3°C/min) and melt annealing/isothermal measurements under V V (parallel-polarized) optical alignment were used to evaluate the melt miscibility and determine the binary interaction parameter χ (7.74 × 10−4 at 423 K). This value of χ is consistent with the value (7.69 × 10−4 at 423 K) determined by earlier small-angle neutron scattering (SANS) measurements obtained by Crist and Rhee on polyethylene blends with the same branching-density difference (Δ y = 0.187). In addition, it was shown that SALS can be used to determine directly the melt miscibility of undeuterated polyolefin ble...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6418d508926b88c7516ecefcf34b276f https://doi.org/10.1080/10426910701860848 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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