Skip to Content
Merck
CN
  • Compatible compositions based on aqueous polyurethane dispersions and sodium alginate.

Compatible compositions based on aqueous polyurethane dispersions and sodium alginate.

Carbohydrate polymers (2012-12-12)
Hamed Daemi, Mehdi Barikani, Mohammad Barmar
ABSTRACT

A series of aqueous polyurethane dispersions were synthesized by the reaction of polytetramethylene glycol and isophorone diisocyanate, extended with dimethylol propionic acid. Their chemical structures were characterized using FTIR, (1)H NMR, and (13)C NMR, and thermal properties were determined by DMTA. Then, a number of aqueous polyurethane dispersions-sodium alginate (PUD/SA) compositions were prepared by addition of sodium alginate solution with different concentrations into the aqueous polyurethane dispersion. Characterization of chemical structure and thermal properties of these blends were performed by FTIR, EDX and DMTA, respectively. The morphology of the alginate in polyurethane matrix was studied by SEM. The hydrophilicity of the prepared samples decreases by increasing the content of sodium alginate in blends. These observations were attributed to the increase of hydrophilicity of the blends as a consequence of addition of hydrophilic carboxylate, hydroxyl and ether functional groups of the alginate to them.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Isophorone diisocyanate, 98%, mixture of isomers
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
5 mL
In Stock
Details...
CN¥384.26
250 mL
In Stock
Details...
CN¥1,288.73
1 L
In Stock
Details...
CN¥2,112.66
Sigma-Aldrich
Poly(tetrahydrofuran), average Mn ~2,000, contains BHT as stabilizer
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
1 L
In Stock
Details...
CN¥1,663.26
3 L
In Stock
Details...
CN¥1,912.27
Sigma-Aldrich
Propionic acid, ≥99.5%
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
500 mL
Estimated to ship on September 24, 2025
Details...
CN¥557.86
1 L
Estimated to ship on September 24, 2025
Details...
CN¥573.33
Sigma-Aldrich
Propionic acid, ≥99.5%, FCC, FG
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
Estimated to ship on September 17, 2025
Details...
CN¥404.65
1 kg
Estimated to ship on October 22, 2025
Details...
CN¥493.39
10 kg
Estimated to ship on October 10, 2025
Details...
CN¥1,648.85
25 kg
Estimated to ship on October 10, 2025
Details...
CN¥2,599.00
Sigma-Aldrich
Propionic acid, natural, 99%, FG
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
Estimated to ship on September 02, 2025
Details...
CN¥441.47
100 g
Estimated to ship on September 10, 2025
Details...
CN¥580.64
1 kg
Estimated to ship on September 10, 2025
Details...
CN¥2,132.65
Sigma-Aldrich
Poly(tetrahydrofuran), average Mn ~2,900
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
25 mL
In Stock
Details...
CN¥460.95
1 L
In Stock
Details...
CN¥1,616.98
3 L
In Stock
Details...
CN¥2,118.23
Sigma-Aldrich
Poly(tetrahydrofuran), average Mn ~1,000
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
25 mL
Please contact Customer Service for Availability
CN¥561.40
1 L
Please contact Customer Service for Availability
CN¥1,663.26
3 L
Please contact Customer Service for Availability
CN¥1,931.88
18 L
Estimated to ship on December 29, 2025
Details...
CN¥10,871.32
Sigma-Aldrich
Propionic acid, puriss. p.a., ≥99.5% (GC)
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
250 mL
Estimated to ship on October 21, 2025
Details...
CN¥644.33
1 L
Estimated to ship on October 21, 2025
Details...
CN¥1,057.32
Sigma-Aldrich
Propionic acid, BioReagent, suitable for insect cell culture, ~99%
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
1 L
Estimated to ship on September 24, 2025
Details...
CN¥438.10
Supelco
Propionic acid, analytical standard
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
1 mL
In Stock
Details...
CN¥552.02
5 mL
In Stock
Details...
CN¥1,902.20
Sigma-Aldrich
Propionic acid, ACS reagent, ≥99.5%
Sign Into View Organizational & Contract Pricing
SKUPack SizeAvailabilityPriceQuantity
100 mL
In Stock
Details...
CN¥494.42
500 mL
In Stock
Details...
CN¥844.54
4 x 100 mL
Estimated to ship on September 24, 2025
Details...
CN¥1,752.17