dor_id: 41372

506.#.#.a: Público

590.#.#.d: Los artículos enviados a la Revista Mexicana de Física se someten a un estricto proceso de revisión llevado a cabo por árbitros anónimos, independientes y especializados en todo el mundo.

510.0.#.a: Consejo Nacional de Ciencia y Tecnología (CONACyT), Sistema Regional de Información en Línea para Revistas Científicas de América Latina, el Caribe, España y Portugal (Latindex), Scientific Electronic Library Online (SciELO), SCOPUS, Web Of Science (WoS)

561.#.#.u: http://www.fciencias.unam.mx/

650.#.4.x: Físico Matemáticas y Ciencias de la Tierra

336.#.#.b: info:eu-repo/semantics/article

336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://revistas.unam.mx/index.php/rmf

351.#.#.b: Revista Mexicana de Física

351.#.#.a: Artículos

harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

590.#.#.c: Open Journal Systems (OJS)

270.#.#.d: MX

270.1.#.d: México

590.#.#.b: Concentrador

883.#.#.u: http://www.revistas.unam.mx/front/

883.#.#.a: Revistas UNAM

590.#.#.a: Coordinación de Difusión Cultural

883.#.#.1: http://www.publicaciones.unam.mx/

883.#.#.q: Dirección General de Publicaciones y Fomento Editorial, UNAM

850.#.#.a: Universidad Nacional Autónoma de México

856.4.0.u: http://revistas.unam.mx/index.php/rmf/article/view/14217/13554

100.1.#.a: Villegas, J. A.; Cervantes, J.

524.#.#.a: Villegas, J. A., et al. (2006). Second virial coefficient of a series of polysiloxanes: the effect of side groups and molecular weight. Revista Mexicana de Física; Vol 52, No 006. Recuperado de https://repositorio.unam.mx/contenidos/41372

245.1.0.a: Second virial coefficient of a series of polysiloxanes: the effect of side groups and molecular weight

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2006

264.#.1.c: 2006-01-01

653.#.#.a: Polysiloxane; second virial coefficient; gyration-radius expansion factor; interpenetration function; molecular conformation

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, fecha de asignación de la licencia 2006-01-01, para un uso diferente consultar al responsable jurídico del repositorio por medio de rmf@ciencias.unam.mx

884.#.#.k: http://revistas.unam.mx/index.php/rmf/article/view/14217

041.#.7.h: eng

520.3.#.a: This study reports the results of analyzing the second virial coefficient (A2) in a good solvent for a series of polysiloxane chains in which the pairs of substituents connected to the silicon are CH3, CH3;C2H5, C2H5; CH3, C6H13;CH3, C16H33;and CH3, C6H5.The effect of the side group and molecular weight on A2 was investigated using the Helical Wormlike (HW) chain model. A theoretical analysis of the interpenetration function (ψ) was carried out using a Two-Parameter (TP) scheme. The theoretical-experimental behaviour of A2in a series of polysiloxanes was investigated considering the effects of the type of substituent on the main chain, molecular conformation, and molecular weight. The results obtained were strongly dependent on the flexibility of the side groups and the molecular weight of the polymer. Within the HW model and TP scheme, the A2 value for poly(dimethylsiloxane) (PDMS1 and PDMS2), poly(diethylsiloxane) and poly(methylhexylsiloxane) agrees with the experimental results obtained through the coupled system (Gel Permeation Chromatography/Light Scattering: GPC/LS). However, the A2 calculated for PDMS3, poly(methylhexadecylsiloxane) (PMHDS) and poly(methylphenylsiloxane) (PMPS) showed a significant difference from the experimental value. On the basis of the theory for the HW model, the deviation in PDMS3 may be due to the effect of the end chains. For PMHDS and PMPS, the model used is outside of the coil limit (validity of TP model). In PMHDS the determination of the (RMSradius)2value from the GPC/LS system is strongly influenced by the interaction between the bulkyside group and the main chain, which affects the calculation of A2.

773.1.#.t: Revista Mexicana de Física; Vol 52, No 006 (2006)

773.1.#.o: http://revistas.unam.mx/index.php/rmf

046.#.#.j: 2020-11-25 00:00:00.000000

022.#.#.a: 2683-2224 (digital); 0035-001X (impresa)

310.#.#.a: Bimestral

264.#.1.b: Sociedad Mexicana de Física, A.C.

758.#.#.1: http://revistas.unam.mx/index.php/rmf

handle: 00ce0c512981980f

harvesting_date: 2020-09-23 00:00:00.0

856.#.0.q: application/pdf

last_modified: 2020-11-27 00:00:00

license_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es

license_type: by-nc-nd

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