The chemical and physical properties of polymers depend on their structure. For that reason ... 2,2-dimethyltrimethylene carbonate. Macromol. Chem. Phys. 187, 2579–2589 (1986).

yet extraction from carbonate reservoirs can be very challenging and much of the oil and gas often remains unrecovered. After the rock is formed, it undergoes a range of chemical and physical ...

For example, the hard part of your bones and teeth is made from calcium connected to a chemical called “phosphate”. Together, they make the substance, calcium phosphate. Sidewalk chalk is made from ...