Novel Thermoplastic Elastomers: Polyisobutylene-block-polyamide Multiblocks

Zaschke, Bernd; Kennedy, Joseph P.

doi:10.1021/ma00117a011

Cited by 18 publications

(12 citation statements)

References 8 publications

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“…Most previous studies [1][2][3][4][5][6] on structure-property relationships of polyurethanes have been focused on polyether, polyester, and polycarbonate macrodiols. There has been some recent interest on polyurethanes based on nonpolar macrodiols, such as polydimethylsiloxane (PDMS), 7 polyisobutylene, 8 and polybutadiene 9 macrodiols. Typically, polyurethanes based on nonpolar macrodiols are highly phase separated (poor interfacial adhesion) and, consequently, have poor mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of chain extender structure on the properties and morphology of polyurethanes based on H12MDI and mixed macrodiols (PDMS-PHMO)

Adhikari¹,

Gunatillake²,

McCarthy³

et al. 1999

J. Appl. Polym. Sci.

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Section: Introductionmentioning

confidence: 99%

Effect of chain extender structure on the properties and morphology of polyurethanes based on H12MDI and mixed macrodiols (PDMS-PHMO)

Adhikari¹,

Gunatillake²,

McCarthy³

et al. 1999

J. Appl. Polym. Sci.

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Section: Introductionmentioning

confidence: 99%

Effect of chain extender structure on the properties and morphology of polyurethanes based on H12MDI and mixed macrodiols (PDMS–PHMO)

Adhikari

Gunatillake

McCarthy

et al. 1999

J. Appl. Polym. Sci.

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ABSTRACT:The effect of chain extender structure on properties and morphology of ␣,-bis(6-hydroxyethoxypropyl) polydimethylsiloxane (PDMS) and poly(hexamethylene oxide) (PHMO) mixed macrodiol-based aliphatic polyurethane elastomers was investigated using tensile testing, differential scanning calorimetry (DSC), and dynamic mechanical thermal analysis (DMTA). All polyurethanes were based on 50 wt % of hard segment derived from 4,4Ј-methylenecyclohexyl diisocyanate (H 12 MDI) and a chain extender mixture. 1,4-Butanediol was the primary chain extender, while one of 1,3-bis(4-hydroxybutyl)tetramethyldisiloxane (BHTD), 1,3-bis(3-hydroxypropyl)tetramethyldisiloxane (BPTD), hydroquinonebis(2-hydroxyethyl)ether (HQHE), 1,3-bis(3-hydroxypropyl)tetramethyldisilylethylene (HTDE), or 2,2,3,3,4,4-hexafluoro-1,5-pentanediol (HFPD) each was used as a secondary chain extender. Two series of polyurethanes containing 80 : 20 (Series A) and 60 : 40 (Series B) molar ratios of primary and secondary chain extenders were prepared using one-step bulk polymerization. All polyurethanes were clear and transparent and had number-average molecular weights between 56,000 and 122,100. Incorporation of the secondary chain extender resulted in polyurethanes with low flexural modulus and high elongation. Good ultimate tensile strength was achieved in most cases. DSC and DMTA analyses showed that the incorporation of a secondary chain extender disrupted the hard segment order in all cases. The highest disruption was observed with HFPD, while the silicon-based chain extenders gave less disruption, particularly in Series A. Further, the silicon chain extenders improved the compatibility of the PDMS soft segment phase with the hard segment, whereas with HFPD and HQHE, this was not observed.

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“…Meanwhile, some researchers are also continuously exploring the use of new flexible materials to constitute the soft segment of TPAEs. [ 51,52 ] It is found that polyisobutylene (PIB) material displays inertness and outstanding chemoresistance properties, facilitating it to be an optimal candidate to act as the soft segment for TPAEs. [ 53 ] In the paper by Kucera et al., [ 54 ] a series of PA‐b‐PIB segmented block copolymers were formed via a polycondensation reaction based on dicarboxylic‐terminated PA and diamine‐terminated PIB (NH 2 –PIB–NH 2 ).…”

Section: Synthesis Of Tpaesmentioning

confidence: 99%

Thermoplastic Polyamide Elastomers: Synthesis, Structures/Properties, and Applications

Gong

Zhao

Chen

et al. 2021

Macro Materials & Eng

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Thermoplastic polyamide elastomers (TPAEs) have emerged as important thermoplastic elastomer materials with significant potentials owing to their excellent low‐temperature flexibility, easy processability, lightweight, good thermal stability and mechanical properties, etc. Over the last few decades, TPAEs have rapidly developed into a large variety of kinds of TPAEs. Striking advancements have been achieved in this research field. Unfortunately, there is not yet a review to summarize the progress. The present paper summarizes the major advancements dealing with TPAEs, in which synthesis, structures/properties as well as applications are introduced in detail. Moreover, current challenges and main developmental directions dealing with TPAEs are also presented. This review may motivate more interest in TPAEs, further facilitating their all‐side research and more large‐scale applications.

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Novel Thermoplastic Elastomers: Polyisobutylene-block-polyamide Multiblocks

Cited by 18 publications

References 8 publications

Effect of chain extender structure on the properties and morphology of polyurethanes based on H12MDI and mixed macrodiols (PDMS-PHMO)

Effect of chain extender structure on the properties and morphology of polyurethanes based on H12MDI and mixed macrodiols (PDMS-PHMO)

Effect of chain extender structure on the properties and morphology of polyurethanes based on H12MDI and mixed macrodiols (PDMS–PHMO)

Thermoplastic Polyamide Elastomers: Synthesis, Structures/Properties, and Applications

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