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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.
Hydroxyl-terminated polybutadiene (HTPB) is an oligomer of butadiene terminated at each end with a hydroxyl functional group. It reacts with isocyanates to form polyurethane polymers. HTPB is a translucent liquid with a color similar to wax paper and a viscosity similar to corn syrup.
1,3-Butadiene (/ ˌ b juː t ə ˈ d aɪ iː n / ⓘ) [8] is the organic compound with the formula CH 2 =CH-CH=CH 2.It is a colorless gas that is easily condensed to a liquid. It is important industrially as a precursor to synthetic rubber. [9]
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.
Isotactic PB-1 is produced commercially using two types of heterogeneous Ziegler–Natta catalysts. [3] The first type of catalyst contains two components, a solid pre-catalyst, the δ-crystalline form of TiCl 3, and solution of an organoaluminum cocatalyst, such as Al(C 2 H 5) 3.
Most polyolefin are made by treating the monomer with metal-containing catalysts. The reaction is highly exothermic. Traditionally, Ziegler-Natta catalysts are used. Named after the Nobelists Karl Ziegler and Giulio Natta, these catalysts are prepared by treating titanium chlorides with organoaluminium compounds, such as triethylaluminium.
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.
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 ().