Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/137762
Title: Morphology and linear rheology of comb-like copolymer melts with high grafting density: Ⅱ. Heterografted PVSt-g-(PS/PE) comb-like copolymer with short backbone and mixed side chains
Authors: Lin, Yichao
Zhang, Shaofeng
Ye, Lin
Gu, Yang
Wang, Yanhui
Ma, Li
Tang, Tao
Keywords: Science::Chemistry
Issue Date: 2018
Source: Lin, Y., Zhang, S., Ye, L., Gu, Y., Wang, Y., Ma, L., & Tang, T. (2018). Morphology and linear rheology of comb-like copolymer melts with high grafting density: Ⅱ. Heterografted PVSt-g-(PS/PE) comb-like copolymer with short backbone and mixed side chains. Polymer, 137, 222-230. doi:10.1016/j.polymer.2018.01.023
Journal: Polymer
Abstract: A series of heterografted PVSt-g-(PS/PE) based on polystyrene (PS) backbone with mixed PS and polyethylene (PE) side chains was obtained, in which the branching density of PVSt-g-(PS/PE) was above 72%. Because of the extremely short backbone, long side chains and high branching density in these comb-like copolymers, the topological structure of PVSt-g-(PS/PE) was similar to asymmetrical star copolymers. By adjusting the molar ratio of PS and PE side chains, the total PS (PVSt backbone + side chain PS) volume fraction in the graft copolymers could be adjusted. PVSt-g-(PS/PE) showed a microphase-separated structure at the melt state, depending on the composition of the copolymers. When the volume fraction of PS changed from 42.7% to 76.9%, the microphase-separated structures changed from lamellar phase structure to cylindrical morphology. Furthermore, all the PVSt-g-(PS/PE) samples with the microphase-separated structure showed a typical rheological behavior of cross-linked network-like structure, but the change trend of melt elasticity of the copolymer with increasing temperature depended on the microphase-separated structure.
URI: https://hdl.handle.net/10356/137762
ISSN: 0032-3861
DOI: 10.1016/j.polymer.2018.01.023
Rights: © 2018 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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