2633-57-0Relevant articles and documents
Environment-friendly synthesis and performance of a novel hyperbranched epoxy resin with a silicone skeleton
Zhang, Daohong,Liang, Enbin,Li, Tingcheng,Chen, Sufang,Zhang, Junheng,Cheng, Xinjian,Zhou, Jiliang,Zhang, Aiqing
, p. 3095 - 3102 (2013)
Hyperbranched epoxy resins have attracted increasing attention for their excellent comprehensive performance in toughening and reinforcing the diglycidyl ether of bisphenol-A (DGEBA). However, the tedious synthetic procedure, high cost, and the use of large amounts of organic solvents have hampered their industrial application. This paper presents an environment-friendly method to synthesize a novel hyperbranched epoxy resin with a silicone skeleton (HERSS) through a hydrosilylation reaction catalyzed by a heterogeneous halloysite-supported platinum catalyst. The reaction involves only one solvent and affords a high yield (>90%). The chemical structure, molecular weight, and degree of branching of the HERSS were characterized by FT-IR, GPC and NMR. The resulting HERSS was used to modify a DGEBA based epoxy resin and showed excellent performance. With the incorporation of 9 wt% HERSS, the impact, flexural and tensile strength of DGEBA are increased by about 92.5%, 36.0% and 88.6%, respectively. The toughening and reinforcing mechanism was attributed to the sea-island structure of the cure composite, as shown by the SEM micrographs of the fractured surfaces. An initial thermal decomposition temperature of about 380.0 °C of the cured HERSS/methyl nadic anhydride resin also indicates promising applications with regard to high-temperature- resistance.
Zinc mediated allylations of chlorosilanes promoted by ultrasound: Synthesis of novel constrained sila amino acids
Ramesh, Remya,Reddy, D. Srinivasa
supporting information, p. 4093 - 4097 (2014/06/10)
A simple, fast and efficient method for allylation and propargylation of chlorosilanes through zinc mediation and ultrasound promotion is reported. As a direct application of the resulting bis-allylsilanes, three novel, constrained sila amino acids are prepared for the first time. The design and synthesis of the constrained sila analogue of GABA (γ-amino butyric acid) is a highlight of this work. This journal is the Partner Organisations 2014.
Carbosilane dendrons functionalized at their focal point
Andres, Roman,De Jesus, Ernesto,De La Mata, F. Javier,Flores, Juan C.,Gomez, Rafael
, p. 3742 - 3749 (2007/10/03)
The Si-Ph bond of PhSi[(CH2)3SiMe2Bz] 3 (5) is cleaved with triflic acid to give TfOSi[(CH 2)3SiMe2Bz]3, which, in turn, reacts with triethylammonium chloride or potas
