Disclosed are compounds of formula (I), which are of use in the treatment of bacterial diseases and infections, to compositions containing those compounds and to methods of treating bacterial diseases and infections using the compounds. In particular, the compounds are useful for the treatment of infection with, and diseases caused by,
Clostridium difficile
.
Comparison of Homo-Polyimide Films Derived from Two Isomeric Bis-Benzimidazole Diamines
作者:Meng Lian、Feng Zheng、Lingbin Meng、Fei Zhao、Jun Liu、Jimei Song、Qinghua Lu
DOI:10.3390/molecules28134889
日期:——
rotational energy compared to 4-AB, resulting in a higher glass transition temperature (Tg) in PIs prepared from 3-AB. On the other hand, PIs containing 4-AB exhibited a higher level of molecular linearity, leading to a lower coefficient of thermal expansion (CTE) compared to PIs prepared from 3-AB. Furthermore, all PIs showed higher thermal stability with a 5% weight loss temperature above 530 °C and
含有苯并咪唑的杂芳族聚酰亚胺(PI)因其对PI性能的积极影响而引起了极大的关注。一些含有 4,4'-[5,5'-bi-1H-苯并咪唑]-2,2'-二基双苯胺 (4-AB) 的 PI 的研究已有报道。然而,含有 3,3'-[5,5'-bi-1H-苯并咪唑]-2,2'-二基双苯胺 (3-AB) 的均聚酰亚胺 (homo-PI) 缺乏报道,3-AB 是一种4-AB 的异构体。本文研究了氨基位置对同型PI性能的影响。结果发现4-AB中胺N基团的净电荷比3-AB低,导致4-AB的反应活性更高。因此,含有 4-AB 的 PI 显示出更好的机械性能。分子模拟证实3-AB及其相应的PI链表现出扭曲的构象,导致含有3-AB的PI薄膜颜色较浅。此外,与 4-AB 相比,3-AB 结构经计算具有更高的旋转能,从而导致由 3-AB 制备的 PI 具有更高的玻璃化转变温度 (Tg)。另一方面,与由 3-AB 制备的
THERMOSETTING RESIN COMPOSITION
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0182919A1
公开(公告)日:1986-06-04
Workability of polyaminobismaleimide resin composition is improved by using an epoxy group-containing vinyl compound to obtain a solvent-free resin composition. Particularly, combined use of an epoxy group-containing vinyl compound and an epoxy resin depresses cure shrinkage to improve dimensional stability and appearance of cured moldings.
A thermosetting resin composition comprises (a) a preliminary reaction product of a polyamino compound and an unsaturated bismaleimide compound, (b) an epoxy group-containing vinyl compound, (b′) a vinyl group-free aliphatic or aromatic halogenated epoxy compound, (c) an epoxy curing agent and (d) a radical polymerisation initiator as indispensable components, is light of weight and has excellent heat resistance, strength and flame retardancy.
Material of construction for the inside of the fan case of a turbofan engine and the method of preparing the same
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0414570A2
公开(公告)日:1991-02-27
There is provided a material for use in constructing the inside (4) of the fan case of a turbofan engine which comprises a polymer composite having a low specific gravity, a high flexural strength and a high glass transition temperature, for example a polymer composite obtainable from
(a) the preliminary reaction product of a polyamino compound and an unsaturated bismaleimide compound;
(b) an epoxy group-containing vinyl compound;
(c) an aliphatic halogenated epoxy compound having no vinyl group;
(d) an epoxy curing agent; and
(e) a radical polymerization initiator.