ポリブタジエン 化學(xué)特性,用途語,生産方法
解説
ポリブタジエン，で表されるブタジエンの重合體．単量體の結(jié)合様式に応じ，立體構(gòu)造はシス-1,4，トランス-1,4，および1,2構(gòu)造に分けられ，後者はさらにイソタクチックとシンジオタクチックの立體異性が存在する．主としてシス-1,4構(gòu)造のポリマーは，チーグラーの立體特異性觸媒で得られ，この加硫物は弾性に富み，耐摩耗性は大きく，天然ゴムより耐熱性が大きいなど，すぐれた特徴をもつゴム合成として工業(yè)化されている．そのほかミクロ構(gòu)造は異なるが，ブチルリチウム觸媒によるものや，乳化重合などによって得られた重合體もゴムとして使用されている．
森北出版「化學(xué)辭典（第2版）
用途
耐摩耗性?耐寒性にすぐれたものはタイヤ?ベルトなどに用い、また熱可塑性ねつかそせい樹脂を加えるなどして機(jī)械部品や包裝用フィルムなどに用いる。
化學(xué)的特性
low molecular weight formulations are liquid, Polybutadiene is a homopolymer of butadiene. The catalysts involved in the polymerization process determine the structure and molecular weight of the rubber. It is used in tires and for other products that require abrasion resistance. At times both SBR and polybutadiene are extended with oils. There are underlying hazards associated with the individual oils, some of which are carcinogenic in animals and suspected human carcinogens.
使用
Component of water soluble binders and electrical encapsulants.
定義
ChEBI: A macromolecule composed of repeating but-2-ene-1,4-diyl units.
調(diào)製方法
The production of polybutadiene involves copolymerizing
three parts butadiene and one part styrene. Also present in
small amounts is an initiator or catalyst, which is usually a
peroxide, and a chain-modifying agent such as dodecyl
mercaptan. Isotactic cis-1,4 polybutadiene has been synthesized
using a titanium halide such as titanium tetrachloride or
titanium tetrabromide; using a cobalt salt of octanoate or
napthenate, or complexes with pyridine; or using nickel
halide catalyst based on boron trifluoride reduced by aluminum
alkyls.
一般的な説明
Polybutadiene is a synthetic rubber that is produced by solution polymerization of 1,3-butadiene. It has excellent mechanical properties which include low temperature flexibility and abrasion resistance. It can be cured by using sulfur based donors and peroxides to result in a highly cross-linked polymer with high resilience.
発がん性
The individual oil extenders are
classified as suspected human carcinogens.
ポリブタジエン 上流と下流の製品情報(bào)
原材料
準(zhǔn)備製品