{"id":1354,"date":"2019-07-15T12:52:01","date_gmt":"2019-07-15T11:52:01","guid":{"rendered":"https:\/\/www.nanoworld.com\/blog\/?p=1354"},"modified":"2023-04-18T12:59:25","modified_gmt":"2023-04-18T11:59:25","slug":"direct-observation-of-long-chain-branches-in-a-low-density-polyethylene","status":"publish","type":"post","link":"https:\/\/www.nanoworld.com\/blog\/direct-observation-of-long-chain-branches-in-a-low-density-polyethylene\/","title":{"rendered":"Direct Observation of Long-Chain Branches in a Low-Density Polyethylene"},"content":{"rendered":"\n

The properties of a polymer change significantly depending on the structure of the polymer chain, particularly, with branched structures, depending on the number of branches and the length of the branch.* However, the long-chain branch (LCB) structure of polyethylene was unclear, due particularly to the complex polymer structure and the limitations of its analysis methods.

In their study \u201cDirect Observation of Long-Chain Branches in a Low-Density Polyethylene\u201d Ken-ichi Shinohara, Masahiro Yanagisawa and Yuu Makida measured the chain length of LCBs and the distance between branch points of LDPE by atomic force microscopy.*

The article mentions the use of NanoWorld Ultra-Short Cantilevers (USC)<\/a> for high speed atomic force microscopy ( AFM probe type USC-F1.2-k0.15<\/a> ) for the single-molecule imaging by atomic force microscopy .*<\/p>\n\n\n\n

\"
Figure 1 from \u201cDirect Observation of Long-Chain Branches in a Low-Density Polyethylene<\/em> \u201c by K. Shinohara et al.: Direct measurement of LCB in a tubular LDPE (F200-0 fractionated). (A) AFM image of a single molecule of LDPE on mica in DMTS at 25\u2009\u00b0C. X: 279\u2009nm, Y: 209\u2009nm, Z: 18\u2009nm. (B) Length of each chain of LDPE. (C) A wire model of self-shrinking structure of polymer chain of LDPE. Main chain: red wire. LCB: black wire. The model was created to be one tenth of the length of the extended chain based on AFM observation (B), MD simulation (Fig. S1), and the molecular weight determined by SEC-MALLS-Visc experiments (see Fig. 2). <\/figcaption><\/figure>\n\n\n\n

*Ken-ichi Shinohara, Masahiro Yanagisawa, Yuu Makida
Direct Observation of Long-Chain Branches in a Low-Density Polyethylene<\/strong>
Nature Scientific Reportsvolume 9, Article number: 9791 (2019)
doi: https:\/\/doi.org\/10.1038\/s41598-019-46035-9<\/p>\n\n\n\n

Please follow this external link for the full article: https:\/\/rdcu.be\/bJY7S<\/a><\/p>\n\n\n\n

Open Access: The article \u00abDirect Observation of Long-Chain Branches in a Low-Density Polyethylene<\/em>\u00bb by Ken-ichi Shinohara, Masahiro Yanagisawa and Yuu Makida is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article\u2019s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article\u2019s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http:\/\/creativecommons.org\/licenses\/by\/4.0\/<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

The properties of a polymer change significantly depending on the structure of the polymer chain, particularly, with branched structures, depending on the number of branches and the length of the branch.* However, the long-chain branch (LCB) structure of polyethylene was unclear, due particularly to the complex polymer structure and the limitations of its analysis methods. … Continue reading Direct Observation of Long-Chain Branches in a Low-Density Polyethylene<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[62,17,50,25,24,122,218,123,120,217,52,26,53,124,51,121,392,393,394,395,396],"class_list":{"0":"post-1354","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-news","7":"tag-afm-probes","8":"tag-atomic-force-microscopy","9":"tag-high-speed-afm","10":"tag-high-speed-scanning","11":"tag-hs-afm","12":"tag-imaging-techniques","13":"tag-polyethylene","14":"tag-polymer-characterization","15":"tag-polymers","16":"tag-single-molecule-imaging","17":"tag-ultra-short-afm-cantilevers","18":"tag-ultrafast-scanning","19":"tag-usc","20":"tag-usc-f1-2-k0-15","21":"tag-video-rate-afm","22":"tag-video-rate-atomic-force-microscopy","23":"tag-afm","26":"tag-395","27":"tag-396"},"_links":{"self":[{"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/posts\/1354","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/comments?post=1354"}],"version-history":[{"count":6,"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/posts\/1354\/revisions"}],"predecessor-version":[{"id":1361,"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/posts\/1354\/revisions\/1361"}],"wp:attachment":[{"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/media?parent=1354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/categories?post=1354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nanoworld.com\/blog\/wp-json\/wp\/v2\/tags?post=1354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}