Segmented polyurethane elastomers derived from aliphatic polycarbonate and poly(ester-carbonate) soft segments for biomedical applications

2012 ◽  
Vol 50 (18) ◽  
pp. 3904-3913 ◽  
Author(s):  
Marcin Sobczak ◽  
Cezary Dębek ◽  
Ewa Olędzka ◽  
Grzegorz Nałęcz-Jawecki ◽  
Wacław L. Kołodziejski ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Segmented Polyurethane ◽  
Polyurethane Elastomers ◽  
Aliphatic Polycarbonate ◽  
Soft Segments

scholarly journals Studies of the Sulfonated Hydrogenated Styrene–Isoprene–Styrene Block Copolymer and Its Surface Properties, Cytotoxicity, and Platelet-Contacting Characteristics

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 235
Author(s):  
Bin-Hong Tsai ◽  
Tse-An Lin ◽  
Chi-Hui Cheng ◽  
Jui-Che Lin
Keyword(s):  
Block Copolymer ◽  
Biomedical Applications ◽  
Human Life ◽  
Thermoplastic Elastomers ◽  
Wound Dressings ◽  
Tert Butyl ◽  
Soft Segments ◽  
Good Biocompatibility ◽  
Uv Ozone ◽  
Ozone Resistance

Styrenic thermoplastic elastomers (TPEs) consist of styrenic blocks. They are connected with other soft segments by a covalent linkage and are widely used in human life. However, in biomedical applications, TPEs need to be chemically hydrogenated in advance to enhance their properties such as strong UV/ozone resistance and thermal-oxidative stability. In this study, films composed of sulfonated hydrogenated TPEs were evaluated. Hydrogenated tert-butyl styrene–styrene–isoprene block copolymers were synthesized and selectively sulfonated to different degrees by reaction with acetyl sulfate. By controlling the ratio of the hydrogenated tert-butyl styrene–styrene–isoprene block copolymer and acetyl sulfate, sulfonated films were optimized to demonstrate sufficient mechanical integrity in water as well as good biocompatibility. The thermal plastic sulfonated films were found to be free of cytotoxicity and platelet-compatible and could be potential candidates in biomedical film applications such as wound dressings.

Novel Blood-Compatible Polyurethanes Containing Poly(butadiene) Soft Segments and Phosphatidylcholine Analogues for Biomedical Applications

1996 ◽  
Vol 8 (7) ◽  
pp. 1441-1450 ◽  
Author(s):  
Yu-Jun Li ◽  
Kerr H. Matthews ◽  
Tian-Ming Chen ◽  
Yan-Feng Wang ◽  
Makoto Kodama ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Soft Segments

Selective Dispersion of Multi-Walled Carbon Nanotubes in Segmented Polyurethane with Different Melt Mixing Process

2017 ◽  
Vol 730 ◽  
pp. 237-241
Author(s):  
Kittimon Jirakittidul ◽  
Krittaya Khrongsakun ◽  
Kannika Khongkhaw ◽  
Kusuman Nernplod
Keyword(s):  
Carbon Nanotubes ◽  
Soft Segment ◽  
Mixing Time ◽  
Melt Mixing ◽  
Segmented Polyurethane ◽  
Soft Segments ◽  
Multi Walled Carbon Nanotubes ◽  
Lcr Meter ◽  
Internal Mixer ◽  
Walled Carbon Nanotubes

Polyurethanes (PU) have been widely used in many applications since their properties can be tailored as desire. In order to improve their electrical property, PU is incorporated with multi-walled carbon nanotubes (MWCNT). The effects of different mixing times and temperatures on selective dispersion of MWCNT in segmented PU were studied. Furthermore, segmented PU based on two different soft segments; i.e. polyester (PU-ester) and polyether (PU-ether), were used. PU/MWCNT nanocomposites were prepared by an internal mixer for 4-12 minutes at 190-210°C. FESEM, DSC and LCR meter were used to characterize morphology and thermal properties. It was found that MWCNT were dispersed in soft segment of PU-ether. Good MWCNT dispersion was able to achieve at high temperature with short mixing time or low temperature with long mixing time. On the other hand, PU-ester/MWCNT nanocomposites, MWCNT preferred to disperse in hard segment and could be dispersed well in PU-ester at low mixing temperature.

Segmented polyurethane elastomers by nonisocyanate route

2015 ◽  
Vol 132 (36) ◽  
pp. n/a-n/a ◽  
Author(s):  
Juliana Nanclares ◽  
Zoran S. Petrović ◽  
Ivan Javni ◽  
Mihail Ionescu ◽  
Franklin Jaramillo
Keyword(s):  
Segmented Polyurethane ◽  
Polyurethane Elastomers
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