Research on cross-linked structure of poly(styrene-co-divinyl benzene) and vacuum flashover characteristics

He, Huan; Mu, Guangying; Wan, Fangchao; Wang, Jun; Zhu, Quanyao; Li, Feng; Wang, Meng

doi:10.1109/tdei.2017.005876

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…The IR spectra proves that the backbone of MSDBs is almost the same, which are composed of polymerized St, DVB, and KH570. As shown in Figure 7(b), all the IR spectra show the peaks at 1600, 1490, and 1450 cm À1 , which are attributed to the aromatic carbon skeleton stretching in St and DVB 22 ; the peaks at 759 and 698 cm À1 are attributed to the out of plane bending vibration of C-H in St 23 ; the peak at 1630 cm À1 belongs to the stretching vibration of C=C bond in residual double bonds from DVB 24 ; the peak at 1722 cm À1 belongs to the C=O stretching in KH570. 25 The peak at 1080 cm À1 belongs to the Si-O vibrations of the "Si-O-CH 3 " group in KH570.…”

Section: The Design and Structure Of The Msdbsmentioning

confidence: 97%

Preparation of hydrophobic and high‐strengthpolymer microspheres based on constructing a “Functionalmonomer‐St‐DVB” copolymer structure:Ultra‐low‐densityproppants

Jinrong

Gong

Zheng

et al. 2022

J of Applied Polymer Sci

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Ultra‐low‐density proppants are of great significant in slick water fracturing system, but the polymer composite microspheres can hardly promise the quality of oil and gas due to their poor hydrophobicity. To address the issue, we prepared several types of modified styrene‐divinyl benzene copolymer microspheres (MSDBs) with long‐term durable hydrophobicity and high strength, including O‐MSDBs (hydrophobic MSDBs), LO‐MSDBs (long‐time hydrophobic MSDBs), and CO‐MSDBs (coated O‐MSDBs) on the basis of a molecular structure of “KH570‐styrene (St)‐divinyl benzene (DVB)” copolymer. In this article, the design concept and the structure of MSDBs was clarified, and performances of MSDBs are systematically discussed and compared with commercially available hydrophobic microspheres. The O‐MSDBs, a kind of nanoparticle patterned St‐DVB copolymer microspheres, were prepared by a one‐step suspension polymerization undergoing a sol–gel process, showing strong hydrophobicity with a water contact angle up to 140.7°, but short durability in strong hydrochloric acid or hydrofluoric acid; On the contrary, LO‐MSDBs perform better in the stability and durability of hydrophobicity with a slightly lower water contact angle about 135.9°. The LO‐MSDBs were designed by coating functionalized St‐DVB copolymer microspheres with fluororesin. Similarly, CO‐MSDBs from fluororesin‐coated O‐MSDBs were designed. As expected, CO‐MSDBs have a stronger hydrophobicity (139.0°) than LO‐MSDBs and longer durability than O‐MSDBs. Moreover, the MSDBs exhibit better properties than the commercially available hydrophobic polymer and ceramic microspheres.

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Section: The Design and Structure Of The Msdbsmentioning

confidence: 97%