Function and performance of silicone copolymers, 3. Synthesis and properties of a novel siliconized acrylic monomer containing three reactive sites

Abstract

SUMMARY: A novel monomer that contains two secondary crosslinking sites (an active methoxysilane group and an epoxide group) was synthesized from an alkoxy exchange reaction between 2-hydroxyethyl methacrylate (2-HEMA) and 3-glycidoxypropyltrimethoxysilane (Z-6040). This monomer (MSA) was copolymerized with methyl methacrylate using 2,29-azoisobutyronitrile (AIBN) as an initiator, and its chemical structure was characterized by 1 H NMR. The temperature for 10% weight loss (T 10 ) determined from thermogravimetric analysis (TGA) decreases with increasing MSA content, while the residual weight at 800 8C (R 800 ) increases with increasing in MSA content. In addition, this monomer can be self-cured via reacting with the moisture in air in the presence of a tin catalyst. The curing reaction is very fast in the first 24 h and almost reaches a plateau value after 7 d. Finally, MSA was blended with trimethylolpropane triacrylate (TMPTA) to form a new UV-coating polymer whose critical surface tension is in the range of 24 -28 dyn/cm.

Novel zwitterionic inorganic–organic hybrids: Synthesis of hybrid adsorbents and their applications for Cu2+ removal

“…Whereas the sharp weight loss beyond T 10 can be assigned to the decomposition of organic ingredients and the production of silica, which is consistent with the result reported in an article [17], in which it is stated that when a polymer contains a pendant active methoxysilane group, the methoxy groups are eliminated to form crosslinked Si-O-Si bonds in the early stages of heating, resulting in the creation of silica.…”

“…The reason can be ascribed to the impact of crosslinking between the organic and inorganic moieties, and the formation of silica hybrid network as extra amount of ion pairs are introduced into the polymer chains, which will lead to the formation of intimate molecular structure and the elevation of thermal degradation temperature [17]. In addition, the electrostatic attraction between the ion pairs will also be responsible for the improved thermal stability of sample D, blocking its further thermal decomposition.…”

Preparation of zwitterionic hybrid polymer and its application for the removal of heavy metal ions from water

“…Whereas the sharp weight loss beyond T 10 can be assigned to the decomposition of organic ingredients, mainly the elimination of the carboxylic acid groups and methoxy groups, and the production of silica. As reported, when a polymer contains a pendant active methoxysilane group, the methoxy groups are eliminated to form crosslinked Si-O-Si bonds in the early stages of heating, resulting in the creation of silica [21]. Table 2 lists the thermal analysis data in TGA curves.…”

“…the thermal degradation temperature decreases with an increase in the organic ingredient of a polymer). However, if the crosslinking of epoxide and methoxysilane to form hybrid network is considered [21], this is reasonable and easily understood. Such crosslinking will lead to the formation of intimate molecular structure and elevation of thermal degradation temperature, which can be confirmed by T ep values in Table 2.…”

Preparation and characteristics of silicone grafted poly(ethersulfone)s

“…These polymers have many attractive attributes such as flexibility, low surface tension, excellent electrical properties, good weatherproofing ability, non-flammability, and high gas permeability, as well as stability toward heat and chemicals. 6 In general, the introduction of stable functional groups as substituent has been of interest to materials science researchers, as they can be used to impart special functionality to polymers as well as to improve processability. [7][8][9] In recent research by our group, an efficient method to fabricate allyl-terminated polymers based on bisphenol A polycarbonate and vinyl-terminated polysulfone were studied.…”