Hydrogen bonding interactions and miscibility between phenolic resin and octa(acetoxystyryl) polyhedral oligomeric silsesquioxane (AS-POSS) nanocomposites

2006 ◽  
Vol 44 (4) ◽  
pp. 673-686 ◽  
Author(s):  
Shiao-Wei Kuo ◽  
Han-Ching Lin ◽  
Wu-Jang Huang ◽  
Chih-Feng Huang ◽  
Feng-Chih Chang
Keyword(s):  
Hydrogen Bonding ◽  
Phenolic Resin ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Hydrogen Bonding Interactions ◽  
Oligomeric Silsesquioxane

scholarly journals Polyhedral oligomeric silsesquioxane (POSS)-modified phenolic resin: Synthesis and anti-oxidation properties

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 316-326
Author(s):  
Bing Wang ◽  
Minxian Shi ◽  
Jie Ding ◽  
Zhixiong Huang
Keyword(s):  
Phenolic Resin ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Synthesis Process ◽  
H Nmr ◽  
Chemical Structures ◽  
Carbon Fiber Fabric ◽  
Oxidation Properties ◽  
Tg And Dtg ◽  
Oligomeric Silsesquioxane ◽  
Fiber Fabric

Abstract In this work, octamercapto polyhedral oligomeric silsesquioxane (POSS-8SH) and octaphenol polyhedral oligomeric silsesquioxane (POSS-8Phenol) were successfully synthetized. POSS-8Phenol was added into the synthesis process of liquid thermoset phenolic resin (PR) to obtain POSS-modified phenolic resin (POSS-PR). Chemical structures of POSS-8SH, POSS-8Phenol, and POSS-PR were confirmed by FTIR and 1H-NMR. TG and DTG analysis under different atmosphere showed that char yield of POSS-PR at 1,000°C increased from 58.6% to 65.2% in N2, which in air increased from 2.3% to 26.9% at 700°C. The maximum pyrolysis temperature in air increased from 543°C to 680°C, which meant better anti-oxidation properties. XRD results confirmed both POSS-8Phenol and POSS-PR-generated crystalline SiO2 in air, which could explain the improvement of anti-oxidation properties. SEM showed that the POSS-PR had phase separation during curing process. Finally, carbon fiber fabric-reinforced POSS-PR (C-POSS-PR) was prepared to verify the anti-oxidation properties of POSS-PR.

scholarly journals Star Poly(N-isopropylacrylamide) Tethered to Polyhedral Oligomeric Silsesquioxane (POSS) Nanoparticles by a Combination of ATRP and Click Chemistry

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Shiao-Wei Kuo ◽  
Jing-Long Hong ◽  
Yu-Chan Huang ◽  
Jem-Kun Chen ◽  
Shih-Kang Fan ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Click Chemistry ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Star Polymers ◽  
Intramolecular Hydrogen Bonding ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
Intramolecular Hydrogen ◽  
Oligomeric Silsesquioxane ◽  
Blue Photoluminescence

New star poly(N-isopropylacrylamide)-b-polyhedral oligomeric silsesquioxane (PNIPAm-b-POSS) copolymers were synthesized from octa-azido functionalized POSS (N3-POSS) and alkyne-PNIPAm, which was prepared using an alkyne-functionalized atom transfer radical polymerization (ATRP) initiator (propargyl 2-bromo-2-methylpropionamide), via click chemistry. These star PNIPAm-b-POSS copolymers undergo a sharp coil-globule transition in water at above 32°C changing from a hydrophilic state below this temperature to a hydrophobic state above it, which is similar to linear PNIPAm homopolymers. More interestingly, we found that these star polymers exhibited strong blue photoluminescence in water above a lower critical solution temperature (LCST). This photoluminescence was likely due to the constrained geometric freedom and relatively rigid structure caused by intramolecular hydrogen bonding within the star PNIPAm polymers, which exhibit an intrinsic fluorescent behavior.

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