Rapid and quantitative 1D ¹³C NMR analysis of polypropylene tacticity with relaxation agent and proton polarization transfer.

ABSTRACT: Polypropylene (PP) accounts for approximately 28.0% of the global polyolefin market, valued at $243.4 billion in 2022. Known for its lightweight, chemical resistance, cost-effectiveness, high strength and melting point, PP is widely used in various applications. Its properties and applications are closely tied to its tacticity. One-dimensional (1D) conventional ¹³C NMR has been extensively utilized to analyze PP tacticity, but its low sensitivity and longer relaxation time remain drawbacks. Typically, analyzing a single PP sample requires around 9 h of NMR time. Using of a cryogenically cooled 10 mm NMR probe can significantly reduce this measurement time; however, its high cost makes it inaccessible for most NMR laboratories. While the refocused insensitive nuclei enhanced by p

SUBMITTER: Duan X 

PROVIDER: S-EPMC12640068 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature