Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 139, Issue 46, Pages -Publisher
WILEY
DOI: 10.1002/app.53144
Keywords
functionalization of polymers; self-assembly; synthesis and processing techniques
Categories
Funding
- Young Talent Fund of Association for Science and Technology in Shaanxi, China [NYHB202221]
- National Natural Science Foundation of China [21104028]
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This paper systematically studied the application of hyperthermal hydrogen-induced cross-linking (HHIC) technology on poly acrylic acid (PAA) and found that PAA can undergo self-cross-linking without polymer substrates. Furthermore, it was discovered that PAA on different substrates can also be cross-linked by secondary electrons generated by X-ray radiation.
The facile technology of hyperthermal hydrogen-induced cross-linking (HHIC) has recently been employed to efficiently cross-link the typical surface modification material of poly acrylic acid (PAA) on polymer substrates, such as polylactic acid substrates, parylene C substrates and hydrophobic polypropylene substrates. This paper systematically studied the HHIC induced self-cross-linking of PAA without polymer substrates. It was found that the -H was cleaved not only from the -C-H, but also from the surface functional group -COOH, evidenced by both X-ray photoelectron spectroscopy (XPS) measurement and the water contact angle test. We explained the self-cross-linking process as a result of both -C-C- bonding and -COOC- bonding. Meanwhile, it was also found that PAA on different substrates can also be cross-linked by secondary electron generated by X-ray radiation during XPS analysis, which could be the main reason for wide variations of different reported XPS results.
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