Effects of Polyether and Polyester Polyols on the Hydrophobicity and Surface Properties of Polyurethane/Polysiloxane Ela
- PDF / 3,487,279 Bytes
- 8 Pages / 595 x 842 pts (A4) Page_size
- 20 Downloads / 252 Views
Article www.springer.com/13233 pISSN 1598-5032 eISSN 2092-7673
Effects of Polyether and Polyester Polyols on the Hydrophobicity and Surface Properties of Polyurethane/Polysiloxane Elastomers Chang-An Xu1,2,3,4 Mangeng Lu*,1,2,3,4,5 Kun Wu1,2,3,4 Jun Shi1,2,3,4
1
Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, P. R. China University of Chinese Academy of Sciences, Beijing 100049, P. R. China 3 Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, Guangzhou, 510650, P. R. China 4 CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, 510650, P. R. China 5 CASH GCC Research Institute of New Materials Co., Ltd, Nanxiong 512400, P. R. China 2
Received April 17, 2020 / Revised June 21, 2020 / Accepted June 26, 2020 Abstract: Polyurethane (PU) elastomer has been widely used in many fields. In this work, polyurethane/polysiloxane elastomers are synthesized by one-step polymerization using polyether and polyester polyols. The properties of polytetramethylene ether glycol (PTMG) and polycarbonate (PCDL) on polyurethane/polysiloxane elastomers are characterized by various test methods. The results show that PTMG is superior to PCDL in heat resistance and hydrophobicity to polyurethane/polysiloxane elastomers. The heat resistance index of PTMGPU is as high as 154 °C, and its contact angle has reached 115.2°. In addition, the surface of PTMGPU contains more silicone. This may be because the chain structure of PTMG is conducive to the migration of siloxane to the surface, and then a Si-O-Si protective layer is formed, thereby improving the heat resistance and hydrophobicity of the surface of PTMGPU. PCDLPU shows good mechanical properties, which may be related to the stronger chain structure of PCDL. This provides a theoretical basis for the future application of polyurethane/polysiloxane materials. Keywords: polyurethane, polyols, polysiloxane, hydrophobicity, surface properties.
1. Introduction Polyurethane (PU) is a polymer with urethane bond (-N-COO).1 The properties of polyurethane can be adjusted via molecular design to make it have excellent chemical, damping capacity, good biocompatibility, high elasticity, and abrasion resistance.2-4 Polyurethanes are synthesized from alternating hard segment and soft segment sequences.5,6 The hard segment of polyurethane consists of a diisocyanate and a chain extender, while the soft segment is a polyol.7 The nature of polyurethane is greatly influenced by the content, type and molecular weight of soft segment.8 Polyurethane contains more hydrophilic functional groups, resulting in the contact angle of polyurethane materials with water generally does not exceed 100°. This will limit the application of polyurethane materials. At present, a large number of effective methods are explored for improving the hydrophobicity and thermal stability of polyurethane, such as chemical modification and physical blending. The consequences of physical blending are that the polymer matrix and fillers may deteriorate compatibil
Data Loading...
