Synthesis and characterization of symmetrical triblock copolymers containing crystallizable high-trans-1,4-polybutadiene

Zhang, Xuetao; Zhang, Chunqing; Wang, Yurong; Li, Yang

doi:10.1007/s00289-009-0192-2

Cited by 7 publications

(2 citation statements)

References 32 publications

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“…Examining the thermal properties, the T g is similar between the isomers; however tPI has a much higher T m than the cis variant (T m trans = 89 °C and T m cis = 34 °C). 223 It should be noted that the diblock architectures incorporating trans-1,4-polyisoprene segments display melt transitions according to DSC analysis 228,229 but similar polymers with cis segments are generally described as amorphous. These observations are corroborated when comparing the mechanical properties between the isomeric polymers.…”

Section: Main-chain Stereochemistry: Cis/trans Stereoisomerism Polydimentioning

confidence: 99%

“…241 There are a number of reports on stereocontrolled SB based polymers that describe thermal properties, but these studies are particularly aimed at altering polymer properties according to microstructure and/or relative block length as opposed to changing the stereochemistry of the respective block(s). 229,[242][243][244][245][246][247][248] Furthermore, a description of mechanical properties is missing for these systems. Nevertheless, there is one significant example to discuss that features of polystyrene-b-polybutadiene-b-polystyrene (SBS) with precise microstructure and stereochemistry (sPS and cPB).…”

Section: Main-chain Stereochemistry: Cis/trans Stereoisomerism Polydimentioning

confidence: 99%

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Stereochemical enhancement of polymer properties

et al. 2019

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The importance of stereochemistry to the function of molecules is generally well understood. However, to date, control over stereochemistry and its potential to influence properties of the resulting polymers are, as yet, not fully realised. This review focuses on the state-of-the-art with respect to how stereochemistry in polymers has been used to influence and control their physical and mechanical properties as well as begin to control their function. A brief overview of the synthetic methodology by which to access these materials is included, with the main focus directed towards stereochemical control over properties such as mechanical, biodegradation and conductivity. Additionally, the advances being made towards enantioseparation, enantioselective catalyst supports and stereo-directed transitions are discussed. Finally, we also consider the opportunities that the rich stereochemistry of sustainably-sourced monomers could offer in this field. Where possible, parallels and general design principles are drawn together to identify opportunities and limitations that these approaches may present in their effects on materials properties, performance and function.

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Section: Main-chain Stereochemistry: Cis/trans Stereoisomerism Polydimentioning

confidence: 99%