Search results
Results From The WOW.Com Content Network
Polybutadiene [butadiene rubber, BR] is a synthetic rubber. It offers high elasticity, high resistance to wear, good strength even without fillers, and excellent abrasion resistance when filled and vulcanized. "Polybutadiene" is a collective name for homopolymers formed from the polymerization of the monomer 1,3-butadiene.
For example, HTPB is used in all 3/4 stages of the Japanese M-5 launch vehicles and in 1/3 stages of Indian PSLV launch vehicle. JAXA describes the propellant as "HTPB/AP/Al=12/68/20", which means, proportioned by mass, HTPB plus curative 12% (binder and fuel), ammonium perchlorate 68% (oxidizer), and aluminum powder 20% (fuel).
Overall, there is a barrier of 24.8 kJ/mol (5.9 kcal/mol) for isomerization between the two conformers. [23] This increased rotational barrier and strong overall preference for a near-planar geometry is evidence for a delocalized π system and a small degree of partial double bond character in the C–C single bond, in accord with resonance theory.
Polybutene is an organic polymer made from a mixture of 1-butene, 2-butene, and isobutylene.Ethylene steam cracker C4s are also used as supplemental feed for polybutene. It is similar to polyisobutylene (PIB), which is produced from essentially pure isobutylene made in a C4 complex of a major refinery.
The Arabic spoken in Indonesia is generally used by people of Arabs descent and Islamic students (santri), primarily based on Hadhrami Arabic brought by Arab traders from Hadramaut, Yemen. This language has a unique feature, which is the mixture of vocabulary from Arabic and Indonesian, as well as other regional languages.
Crystallization from solution yields form-III with the melting point of 106.5 °C. Cooling from the melt results in the form II which has melting point of 124 °C and density of 0.89 g/cm 3 . At room temperature, it spontaneously converts into the form-I with the melting point of 135 °C and density of 0.95 g/cm 3 .
This list of Arab Indonesians includes names of figures from ethnic Arab descent, especially Hadhrami people, in Indonesia.This list also includes the names of figures who are genetically of Arab blood, both those born in the Arab World who later migrated to Indonesia (), or who were born in Indonesia with Arab-blooded parents or Arab Indonesians mix ().
RCTI (Rajawali Citra Televisi Indonesia) - (lit: Hawk Television Indonesia) Private Television Broadcaster Repelita (Rencana Pembangunan Lima Tahun) - Five-Year Development Plan RI (Republik Indonesia) - Republic of Indonesia. RIS (Republik Indonesia Serikat) - The United States of Indonesia (from December 27, 1949, to August 17, 1950).