Dissertation > Excellent graduate degree dissertation topics show

Study on High Performance Dealcoholized RTV-1 Silicone Sealant

Author: LiuCongPan
Tutor: MaWenShi；ZhongHanRong
School: South China University of Technology
Course: Materials Engineering
Keywords: dealcoholized nano-CaCO3 the storage stability silicone sealant
CLC: TQ436.6
Type: Master's thesis
Year: 2011
Downloads: 301
Quote: 0
Read: Download Dissertation

Abstract


The proportion of dealcoholized RTV-1 silicone sealant is growing for its Environment- friendly property, non-corrosive, without odor and keeps well in the harsh environment for physical and electrical properties, but the curing speed of the sealant slows down and the storage stability is poor. In this thesis, in order to acquire dealcoholized RTV-1 silicone sealant with good all-around properties, a series of research on the main component of the sealant were carried out. At the same time, the effect of each component on the storage stability,cure rate and tensile strength were explored.Firstly, the nano-CaCO3, crosslinking agent, catalyst and scavenger were studied in order to find the factor having the greatest impact on the storage stability of the sealant by orthogonal experiments. The results show that, the sorts of nano-CaCO3 have a significant effect on the shelf life based on the selection of materials in this issue. The surface properties of nano-CaCO3 were characterized through SEM and contact angle. The result comes out that the nano-CaCO3 with a good surface treatment can contribute to the storage stability of the sealant. The properties of silicone sealant have been changed very little after aging at 80 degrees for three days. In addition, the tensile strength of the sealant was 2.9MPa and the tack free time is 15min with 100phr nano-CaCO3 of 100nm in the basic composition of sealant.Secondly, a series of exploration were conducted on the types and amounts of crosslinking agent. The results show that the storage performance of the sealant was improved when the crosslinking agents were increased properly. At the same time, we found that the proportion of crosslinking agent had an effect on the process performance of this composition. The adhesive generated a large thickening in the preparation process when A-171’s content was 4phr, it required slow mixing for 5min to reduce the peak viscosity. Moreover, the best proportion of crosslinking agent was obtained. When A-171’s content was 2phr, the curing rate of sealant was improved significantly as well the storage performance.Lastly, the effect of coupling agents on the adhesive strength, the curing rate and the yellowing resistance were studied. The results show that the shear strength was improved obviously with coupling agents containing amino, but the tack-free time was reduced and the yellowing resistance was worse than before. We can not only ensure the good bonding strength but also good yellowing resistant property through mixture of the crosslinking agent.

Related Dissertations

  1. Impact of Some Natural Antioxidants on the Oxidative Stability of Biodiesel,TE667
  2. Research on Aqueous Emulsion Releasing Agent for Aluminum Alloy Die Casting,TQ630.7
  3. Research the Characteristic of the Traditional Meat (Roasted Chicken) During Processing,TS251.67
  4. Research on Processing Technology and Storage Stability of Traditional Fish Noodle,TS254.4
  5. Research and Popularize 38%of Accotab·Oxadiazon SC,S482.4
  6. Basic Study on the Deep Processing and Application of Shellac,TQ431.9
  7. Studies on Charge Storage Stability of Electret Transdermal Patches and Mechanism of Drug Transdermal Transfer,R94
  8. Hemp protein drinks mechanism of development and stability,TS275.4
  9. Composition and Performances Research on the Asphalt of the Stress Absorbing Layer of Modified Asphalt Mix,U414
  10. Research on the Grain Growth Phenomenon on the Stability of Imidacloprid 480 g/L SC,S482.3
  11. Study on Application of Nano-Aluminum Powder in Solid Propellant,V512
  12. Study about a New Method of Brewing Alcohol-Free Beer,TS262.5
  13. Study on PU Stone Chip-resistant Coatings for Motorcar Underbodies,TQ637
  14. Surface can be modified silicone sealants Preparation and Research,TB42
  15. Preparation and Application Study on Surface Paintable Organosilicon Sealants,TB42
  16. A Study on Silicone Sealants with Low Modulus and High Elongation,TB42
  17. Effects of the Magnesium-series Flame Retardant Agents on the Properties of Polysilicone Sealant,TQ314.2
  18. New Damage Detection Mechanism of Structural Silicone Sealant in Hidden Frame Supported Glass Curtain Wall Based on Power Spectrum,TU746.2
  19. Insecticidal Action and Insecticidal Mechanism on Extracts from Polygonum Orientale L.,S482.39
  20. The Role of Neutral Trehalase in Conidiospore Stability During the Storage of the Entomopathogenic Fungus Metarhizium Anisopliae,S476.1
  21. Study on Morphologies, Structures and Properties of Polyphenylenesulfide Composites,TB332

CLC: > Industrial Technology > Chemical Industry > Adhesive Industry > Various properties of adhesive > Sealant
© 2012 www.DissertationTopic.Net  Mobile