Itsuho Aishima

Organometallic complexes containing antimony and aluminum : I. Complex formation of alkylantimony compouunds with aluminum compounds, a1etnC13-n

Abstract The reactions of antimony trichloride with excess triethylylaluminum and with diethylaluminum chloride have been studied. The former reaction gives the complex [SbEt4] [Al2Et5Cl2] and the latter the complex [SbEt4] [AlCl4]. A series of the organometallic complexes containing antimony and aluminum has been prepared by the reactions of quinquevalent ethylantimony halides, i.e. triethylantimony dihalide, tetraethylstibonium halides with various aluminum compounds, AlEtnCl3-n. The proposed formulas of these complexes are shown as [SbEt4] [AlEtnX4-n] (I), [SbEt4] [Al2EtnX7-n] (II) and SbEt3X2-nAIX3 (III), where X is halogen. The former two are thought to be ionic stibonium complex salts and the latter simple adducts. The behavior of 1:1 complex (I) for aluminum alkyls has further been clarified. Triethylstibine also forms various complexes with aluminum compounds, AlEtnCl3-n. The proposed formulas of these complexes are shown as mSbEt3-nAlEtm, Cl3-m, (IV) and SbEt3-SbEt2Cl-AlCl3 (V). The ionic properties of complexes (IV) have been elucidated.

Crystallization-rate of Saran

Saranの結晶化速度に及ぼす可塑剤の種類あるいは, その割合の影響は溶融紡糸技術の面からみて重要な問題であると考えられる。本報告ではこれら可塑剤の影響を明確にするため, 密度勾配管を用いて結晶化曲線を測定した。可塑剤量の増加とともに結晶化速度はしだいに一定値に近づく傾向を示し, logkおよびτiについても同様な結果を得た。また4%以上に可塑剤量が増加すると, 含有VeCl2に対する30℃の平衡結晶化度はほぼ一定の値を示す. また結晶化度算出の基礎となる可塑剤とポリマーの間の比容積の加成性は実験的にかなり正確に成立することを認めた. かなり異なった相溶性を示す可塑剤を用いても結晶化速度はほとんど変化せず, 結晶化速度に及ぼす可塑剤の種類の影響は認められなかった。