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Direct Observation of Long-Chain Branches in a Low-Density Polyethylene.

ABSTRACT: Low-density polyethylene (LDPE) has short-chain branch (SCB) and long-chain branch (LCB). In particular, the influence of the structure of LCBs on polymer properties is remarkable; however, it has been difficult to precisely analyze LCB structures. In this study, we measured the chain length of LCBs and the distance between branch points of LDPE by atomic force microscopy. Consequently, three LCBs were confirmed in a main chain of 162?nm, and their length were measured as 10, 31, and 18?nm. The positions of the LCBs were 33, 70, and 78?nm from the main-chain end.

SUBMITTER: Shinohara KI

PROVIDER: S-EPMC6611765 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Direct Observation of Long-Chain Branches in a Low-Density Polyethylene.

Shinohara Ken-Ichi KI Yanagisawa Masahiro M Makida Yuu Y

Scientific reports 20190705 1

Low-density polyethylene (LDPE) has short-chain branch (SCB) and long-chain branch (LCB). In particular, the influence of the structure of LCBs on polymer properties is remarkable; however, it has been difficult to precisely analyze LCB structures. In this study, we measured the chain length of LCBs and the distance between branch points of LDPE by atomic force microscopy. Consequently, three LCBs were confirmed in a main chain of 162 nm, and their length were measured as 10, 31, and 18 nm. The ...[more]

PMID: 31278359

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