Polypropylene oxide,diamine terminated,mw 2000(248cs)

• CAS: 9046-10-0
• Catalog Number: ACM9046100
• Category: Main Products
• Molecular Weight: 2000
• Molecular Formula: CH₃CH(NH₂)CH₂[OCH₂CH(CH₃)]nNH₂
• Synonyms: O,O-BIS(2-AMINOPROPYL)POLYPROPYLENEGLYCOL;O,O-BIS(2-AMINOPROPYL)POLYPROPYLENE GLYCOL 300;POLY(PROPYLENE OXIDE), DIAMINE TERMINATED;POLYPROPYLENE GLYCOL 300 BIS(2-AMINOPROPYL ETHER);POLYPROPYLENE GLYCOL 130 BIS(2-AMINOPROPYL ETHER);POLY(PROPYLENE GLYCOL) B
• Boiling Point: 260°C
• Flash Point: 365°F
• Density: 0.9964
• Appearance: Liquid
• Alpha Sort: Polypropylene oxide, diamine terminated
• Viscosity: 248cs (25°C)

Case Study

Amino-Terminated Polypropylene Oxide Enhanced the Interfacial Dispersibility of Silica/Carbon Black Mixed-Filled Natural Rubber Composites

Mei, Jiahui, et al. Polymers, 2015, 17(8), 1023.

This study explored the use of a silica/carbon black (SiO2/CB) blended filler system together with various amino-terminated polypropylene oxide variants acting as an innovative interfacial dispersant to produce a natural rubber composite that has low electrical conductivity suitable for spark testing while meeting standard mechanical performance requirements. Three grades of amino-terminated polypropylene oxide were employed: M2005 with a single amino group and molecular weight near 2000, D400 featuring a double amino group and molecular weight around 400, and D2000 with a double amino group and molecular weight close to 2000.
Key Findings
In the carbon black/natural rubber composite system, all three types of amino-terminated polypropylene oxide notably enhanced the dispersion of carbon black, increased the composite's mechanical strength-especially the 300% modulus-and expedited the vulcanization process.
In the hybrid filler system, both carbon black and silica displayed excellent dispersion. The natural rubber composite containing 30 phr carbon black and 20 phr silica achieved a tensile strength of 24.03 MPa, a 300% modulus of 15.16 MPa, and an elongation at break of 455.15%. Furthermore, this composite demonstrated a volume resistivity of 5.52 × 10^9 Ω·cm and a surface resistivity of 3.90 × 10^9 Ω, indicating its suitability for use in spark testing for defect detection.

Amino-Terminated Polypropylene Oxide Added to Epoxy Resin to Toughen Thermoset Materials

Zhang, Chongyin, et al. Journal of Macromolecular Science, Part B, 2010, 49(3), 574-591.

In this study, amino-terminated polypropylene oxide (ATPPO) was incorporated into epoxy resin to enhance the toughness of thermosets. It was observed that epoxy thermosets containing ATPPO exhibited a distinctive microscopic phase separation morphology. The creation of nanostructures within these thermosets was linked to the reaction between ATPPO end groups and diglycidyl ether of bisphenol A (DGEBA), resulting in the formation of star-shaped block copolymers made up of polypropylene oxide (PPO) and epoxy segments.
· Preparation of ATPPO-Thermosets
A specified quantity of ATPPO was mixed with DGEBA, continuously stirred at 100°C for 30 minutes until the mixture achieved a uniform and clear consistency. The curing agent MOCA was added to the mixture which was then mixed vigorously until it developed into a homogeneous solution. The ternary mixture was transferred into Teflon molds and subjected to a curing process at 150°C for 3 hours and then at 180°C for 2 hours to produce thermosets containing up to 40 wt% polymer.
· Properties of ATPPO-Toughened Thermosets
The addition of a small amount of ATPPO significantly improved the toughness of the epoxy thermosets. An analysis of the thermal and mechanical properties revealed that the nanostructured thermosets exhibited greater fracture toughness than their binary blends with the same molecular weight. The differences in morphology and properties are attributed to the formation of the nanostructures.