Improved dynamic properties of thermoplastic polyurethanes made from co‐monomeric polyester polyol soft segments based on azelaic acid

2021 ◽  
pp. 50815
Author(s):  
Tuan Noor Maznee Tuan Ismail ◽  
Nor Azowa Ibrahim ◽  
Kosheela Devi Poo Palam ◽  
Aisa Sendijarevic ◽  
Ibrahim Sendijarevic ◽  
...  
Keyword(s):  
Azelaic Acid ◽  
Dynamic Properties ◽  
Polyester Polyol ◽  
Thermoplastic Polyurethanes ◽  
Soft Segments

scholarly journals Structural and Viscoelastic Properties of Thermoplastic Polyurethanes Containing Mixed Soft Segments with Potential Application as Pressure Sensitive Adhesives

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3097
Author(s):  
Mónica Fuensanta ◽  
José Miguel Martín-Martínez
Keyword(s):  
Phase Separation ◽  
Potential Application ◽  
Viscoelastic Properties ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Adhesion Properties ◽  
Pressure Sensitive Adhesives ◽  
Thermoplastic Polyurethanes ◽  
Pressure Sensitive ◽  
Soft Segments

Thermoplastic polyurethanes (TPUs) were synthetized with blends of poly(propylene glycol) (PPG) and poly(1,4-butylene adipate) (PAd) polyols, diphenylmethane-4,4′-diisocyanate (MDI) and 1,4-butanediol (BD) chain extender; different NCO/OH ratios were used. The structure and viscoelastic properties of the TPUs were assessed by infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, thermal gravimetric analysis and plate-plate rheology, and their pressure sensitive adhesion properties were assessed by probe tack and 180° peel tests. The incompatibility of the PPG and PAd soft segments and the segregation of the hard and soft segments determined the phase separation and the viscoelastic properties of the TPUs. On the other hand, the increase of the NCO/OH ratio improved the miscibility of the PPG and PAd soft segments and decreased the extent of phase separation. The temperatures of the cool crystallization and melting were lower and their enthalpies were higher in the TPU made with NCO/OH ratio of 1.20. The moduli of the TPUs increased by increasing the NCO/OH ratio, and the tack was higher by decreasing the NCO/OH ratio. In general, a good agreement between the predicted and experimental tack and 180° peel strength values was obtained, and the TPUs synthesized with PPG+PAd soft segments had potential application as pressure sensitive adhesives (PSAs).

Comparison of Adipic Versus Renewable Azelaic Acid Polyester Polyols as Building Blocks in Soft Thermoplastic Polyurethanes

2016 ◽  
Vol 93 (11) ◽  
pp. 1529-1540 ◽  
Author(s):  
Norhayati Mohd Noor ◽  
Aisa Sendijarevic ◽  
Vahid Sendijarevic ◽  
Ibrahim Sendijarevic ◽  
Tuan Noor Maznee Tuan Ismail ◽  
...  
Keyword(s):  
Azelaic Acid ◽  
Building Blocks ◽  
Thermoplastic Polyurethanes

Synthesis of Biobased Polyester Polyol through Esterification of Sorbitol with Azelaic Acid Catalyzed by Tin(II) Oxide: A Kinetic Modeling Study

2018 ◽  
Vol 58 (2) ◽  
pp. 510-516 ◽  
Author(s):  
M. R. Kamaruzaman ◽  
S. Y. Chin ◽  
E. C. L. Pui ◽  
H. Prasetiawan ◽  
Nurwadiah Azizan
Keyword(s):  
Kinetic Modeling ◽  
Azelaic Acid ◽  
Polyester Polyol ◽  
Acid Catalyzed ◽  
Biobased Polyester ◽  
Modeling Study

Synthesis and Characterization of Novel Segmented Castable Polyurethanes Based on 2,4-TDI and 3,5-DMTDA

2010 ◽  
Vol 29-32 ◽  
pp. 675-681 ◽  
Author(s):  
Xiao Dong Chen ◽  
Tie Jun Ma ◽  
Hai Zhang ◽  
Rong Sheng Chen
Keyword(s):  
Microphase Separation ◽  
Dynamic Properties ◽  
Testing Machine ◽  
Toluene Diisocyanate ◽  
Test Results ◽  
Polyurethane Elastomers ◽  
Soft Phase ◽  
Irregular Shapes ◽  
Soft Segments

A series of three castable polyurethane elastomers were prepared from 2,4- toluene diisocyanate (TDI) and 3,5-dimethyl-thioltoluenediamine (DMTDA) chain extender, with polyethylene adipate (PEA), polyoxytetramethylene glycol (PTMG) and polycaprolactone (PCL) soft segments. The polyol molecular weight employed was 2000g/mol. The polyurethane elastomers were characterized by an electronmechanical universal testing machine, a LX-A Shore durometer and a Dynamic Mechanical analyzer (DMA). In addition, fractured surface of the polyurethane elastomers was investigated by a field emission scanning electron microscopy (FE-SEM). The test results showed PCL based elastomer exhibits the excellent tear and stress-strain properties that polyester based elastomers offer, while retaining superior resilience similar to polyether based elastomers. The static and dynamic properties of PCL based elastomer were more suitable for dynamic applications. SEM micrographs of all polyurethane samples indicated the existing of microphase separation structure. Particles of the dispersed phase formed by hard phase and crystalline part of the soft phase grow bigger with increasing crystallinity of the soft segments. The hard domains are irregular shapes and with size of a few micrometers.

Thermoplastic Polyurethanes From Undecylenic Acid-Based Soft Segments: Structural Features and Release Properties

2013 ◽  
Vol 13 (5) ◽  
pp. 614-622 ◽  
Author(s):  
Cristina Lluch ◽  
Gerard Lligadas ◽  
Joan C. Ronda ◽  
Marina Galià ◽  
Virginia Cádiz
Keyword(s):  
Structural Features ◽  
Undecylenic Acid ◽  
Thermoplastic Polyurethanes ◽  
Soft Segments

scholarly journals Transparent sulfur-containing thermoplastic polyurethanes with polyether and polycarbonate soft segments

2017 ◽  
Vol 75 (3) ◽  
pp. 1211-1235 ◽  
Author(s):  
Magdalena Rogulska
Keyword(s):  
Thermoplastic Polyurethanes ◽  
Soft Segments ◽  
Sulfur Containing

Robust Stretchable Thermoplastic Polyurethanes with Long Soft Segments and Steric Semisymmetric Hard Segments

2020 ◽  
Vol 59 (10) ◽  
pp. 4483-4492 ◽  
Author(s):  
Hangtian Zhang ◽  
Fang Zhang ◽  
Yixian Wu
Keyword(s):  
Thermoplastic Polyurethanes ◽  
Soft Segments ◽  
Hard Segments

Morphology and properties of thermoplastic polyurethanes with dangling chains in ricinoleate-based soft segments

Polymer ◽  
2008 ◽  
Vol 49 (19) ◽  
pp. 4248-4258 ◽  
Author(s):  
Yijin Xu ◽  
Zoran Petrovic ◽  
Sudipto Das ◽  
Garth L. Wilkes
Keyword(s):  
Thermoplastic Polyurethanes ◽  
Soft Segments
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