Physical and mechanical properties of polymers

Mohd Azmil Mohd Noor, Vahid Sendijarevic, Hazimah Abu Hassan, Ibrahim Sendijarevic, Tuan Noor Maznee Tuan Ismail, Hoong Seng Soi, Nurul ‘Ain Hanzah, and Razmah Ghazali, “Polyether polyols as GPC calibration standards for determination of molecular weight distribution of polyether polyols”, J. Appl. Polym. Sci. 2015, DOI: 10.1002/APP.42698

Chemical properties and synthesis of organic polymers

T1 - Synthesis and properties of vermiculite-reinforced polyurethane nanocomposites
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KW - polymer-clay nanocomposites

At some point (corresponding to 1-3% of total added monomer) the polymeric "comb" associates into a spherical structure, in which the insoluble copolymer is located in the center of the sphere, and the macromer chains are in the surface, where they can interact with the continuous polyol phase.

Syntheses of low insaturation degree (

The so-called macromer stabilizers are PPG's which have been functionalized with a vinyl moiety (for the PPG's reaction with maleic anhydride, ethylisocyanate methacrylate, methacryloyl chloride, etc), which will undergo copolymerization with SAN monomers (Figure 1.26).

Some examples of the main reasons for choosing polyurethanes as shown in Table 1.
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The Polyol Process | SpringerLink

Author of 20 technical papers and 3 US patents. He holds a Ph.D. in Chemical Engineering from University of Illinois, Urbana-Champaign and a B.S.E. degree in Chemical Engineering from The University of Michigan, Ann-Arbor. His Ph.D. thesis work focused on the study of structure-property relationships of highly branched dendritic polymers determining the effects of the degree of branching and end-groups functionality on the inter-molecular and intra-molecular interactions of dendritic molecules. He explored the properties of dendritic molecules in blends with linear polymers and in application of dendritic polymers as processing additives and surface modifiers. As an associate engineer at Merck & Co he worked on the scale-up of organic chemistry processes for production of Active Pharmaceutical Ingredients. In this effort he worked on the scale-up efforts of dozens of chemical steps and amongst other achievements was responsible for the development of a novel impurity rejection method and the development of a novel crystallization process.
At Troy Polymers Inc., he works on the commercialization of the in-house technologies and on the business development of the company. He is also contributing to the development of TPI’s scale-up and processing laboratories. He is a frequent reviewer for Journal of American Chemical Science.

A study of polyether-polyol- and polyester-polyol …

“Performance of EMEROX Renewable Polyols and INFIGREEN Recycled Polyols in Resilient MDI Molded Flexible Polyurethane Foams,” Chemistry and Renewables Session, Proceedings of the CPI Polyurethane Technical Conference, September 22-24, 2014, Dallas, Texas.

Polyester Polyols Show Advantages in Polyurethane Adhesives

VORANOL 223-060LM is a low-viscosity, room-temperature liquid (300 ± 15 mPa·s, 25 °C, ASTM D4878) with an OH number of 61 ± 2 mg/g (ASTM D4274D). The polyol is fully miscible (>14 d) with commonly used polyether polyols, such as PTMEG, and can be utilized in a wide variety of CASE and TPU applications. The polyol exhibits reactivity comparable to PTMEG due to high primary hydroxyl content. Production cost savings can be achieved by enabling fast cure, reduced process cycle times and decreased processing temperatures. Furthermore, this polyol enables the creation of CASE and TPU products with excellent mechanical properties due to its low monol content.

Synthesis of a New Mannich Polyether Polyol - …

Alternatively (physical blowing), a liquid with a low boiling point, for example pentane, is mixed into the polyol. The reaction is exothermic and so, as it proceeds, the mixture warms up and the pentane vaporizes.