Thermogravimetric Studies of Silica Physically and Chemically Modified with the Liquid Crystal 4′-Cyano-4-Biphenyl[4-(4-Pentenyloxy)]Benzoate
✍ Scribed by Y.W. Zhou; M. Jaroniec; R.K. Gilpin
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 83 KB
- Volume
- 185
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
In the current work, the interactions of the liquid crystal, The interactions of the liquid crystal, 4-cyano-4-biphenyl[4-(4- 4-cyano-4-biphenyl[4-(4-pentenyloxy)]benzoate (CBPB), pentenyloxy)]benzoate (CBPB), with unmodified and chemically with underivatized and silica chemically modified with derivatized silica have been studied by high-resolution thermo-CBPB have been investigated by high resolution thermogravimetric analysis (HR-TGA). When CBPB is physically coated gravimetric analysis. In the latter instance, CBPB was cononto unmodified silica it undergoes a multistep thermal desorption verted to its corresponding dimethylchlorosilane derivative process. However, when silica is chemically modified with CBPB which was reacted with silica under anhydrous conditions. and subsequently physically coated with CBPB it exhibits a more
The resulting material was then physically coated with homogeneous thermal desorption profile which reflect differences CBPB and HR-TGA measurements carried out.