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• W3032782380 endingPage "1698" @default.
• W3032782380 startingPage "1687" @default.
• W3032782380 abstract "Abstract Two diastereomeric derivatives of norbornene, dimethyl (1R,2R,3S,4S)‐bicyclo[2.2.1]hept‐5‐ene‐2,3‐dicarboxylate and dimethyl (1R,2S,3S,4S)‐bicyclo[2.2.1]hept‐5‐ene‐2,3‐dicarboxylate, were synthesized and polymerized using ring‐opening metathesis polymerization (ROMP). For comparative purposes, diastereomeric derivatives of Dewar benzene, dimethyl (1R,2S,3R,4S)‐bicyclo[2.2.0]hex‐5‐ene‐2,3‐dicarboxylate and dimethyl (1R,2S,3S,4S)‐bicyclo[2.2.0]hex‐5‐ene‐2,3‐dicarboxylate, were also synthesized and polymerized using ROMP. The polymerization reactions proceeded in a controlled manner as evidenced in part by linear relationships between the monomer‐to‐catalyst feed ratios and the molecular weights of the polymer products. Chain extension experiments were also conducted which facilitated the formation of block copolymers. Although the poly(norbornene) derivatives exhibited glass transition temperatures that were dependent on their monomer stereochemistry ( cis : 115°C vs. trans : 125°C), more pronounced differences were observed upon analysis of the polymers derived from Dewar benzene ( cis : 70°C vs. trans : 95°C). Likewise, microphase separation was observed in block copolymers that were prepared using the diastereomeric monomers derived from Dewar benzene but not in block copolymers of the norbornene‐based diastereomers. The differential thermal properties were attributed to the relative monomer sizes as reducing the distances between the polymer backbones and the pendant stereocenters appeared to enhance the thermal effects." @default.
• W3032782380 created "2020-06-05" @default.
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• W3032782380 date "2020-05-26" @default.
• W3032782380 modified "2023-10-13" @default.
• W3032782380 title "A systematic study of stereochemical effects in homologous poly(alkenamer)s: Dewar benzene versus norbornene" @default.
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• W3032782380 doi "https://doi.org/10.1002/pol.20200250" @default.
• W3032782380 hasPublicationYear "2020" @default.
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