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1,3-Butadiene is an organic compound that is a simple conjugated diene hydrocarbon (dienes have two carbon-carbon double bonds). Polybutadiene forms by linking many 1,3-butadiene monomers to make a much longer polymer chain molecule.
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).
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.
Polybutadiene acrylonitrile (PBAN) [1] copolymer, also noted as polybutadiene—acrylic acid—acrylonitrile terpolymer [2] is a copolymer compound used most frequently as a rocket propellant fuel mixed with ammonium perchlorate oxidizer. [3] It was the binder formulation widely used on the 1960s–1970s big boosters (e.g., Titan III and Space ...
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. [1]
PBAT (short for polybutylene adipate terephthalate) is a biodegradable random copolymer, specifically a copolyester of adipic acid, 1,4-butanediol and terephthalic acid.PBAT is produced by many different manufacturers and may be known by the brand names ecoflex, Wango, Ecoworld, Eastar Bio, and Origo-Bi.
Indonesian Arabic (Arabic: العربية الاندونيسية, romanized: al-‘Arabiyya al-Indūnīsiyya, Indonesian: Bahasa Arab Indonesia) is a variety of Arabic spoken in Indonesia. It is primarily spoken by people of Arab descents and by students ( santri ) who study Arabic at Islamic educational institutions or pesantren .
The members of the association declared their oath affirming their allegiance to Indonesia as their homeland (rather than Hadhramaut) and Bahasa Indonesia as their mother tongue. [4] The Arab-Indonesian youth also pledged three oaths ("Sumpah Pemuda Keturunan Arab"): The motherland of Arab-Indonesians is Indonesia.