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Updated: Feb 5, 2026

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
Published on: November 27, 2015
The polymerization of nitrogen in Li2N2 at high pressures
Jie Zhang1, Xianlong Wang1,2, Kaishuai Yang1,2
1Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.
Abstract:
The polymerization of nitrogen can be used as high energy density materials. The crystal structures of Li2N2 at high pressures are explored by using the first-principles method combined with evolutionary algorithm. The phase transitions Pmmm → Immm → Pnma → Cmcm-1 → I41/acd are predicted in the pressure range of 0-300 GPa. Enthalpy calculations reveal that the tetragonal phase I41/acd containing the spiral nitrogen chains is stable above 242 GPa, indicating that the polymerization of nitrogen is realized in Li2N2 under pressure.
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