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Salazkin SN, Shaposhnikova VV. Poly(arylene ether ketones): Thermostable, Heat Resistant, and Chemostable Thermoplastics and Prospects for Designing Various Materials on Their Basis. POLYMER SCIENCE SERIES C 2020. [DOI: 10.1134/s1811238220020125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Tseng YC, Hsieh YC, Chin NY, Huang WY, Hou SS, Jan JS. Synthesis, thermal properties and rheological behaviors of novel Poly(ethylene glycol) segmented Poly(arylene ether)s. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
Stress relaxation of cured phenylethynyl-terminated polyimides was used to estimate their equilibrium rubbery moduli. The corresponding concentrations of elastically effective chains derived from classical rubber elasticity theory were less than one-fifth what would be expected if every chain end participated in a crosslink. A model is proposed to allow the calculation of the average crosslink functionalities.
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Affiliation(s)
| | - B J Jensen
- Composites and Polymers Branch, NASA Langley Research Center, Hampton, VA 23681-0001, USA
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