Preparation of nylon 66/mesoporous molecular sieve composite under high pressure
✍ Scribed by Yoshitsugu Kojima; Takaaki Matsuoka; Hideroh Takahashi
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 179 KB
- Volume
- 74
- Category
- Article
- ISSN
- 0021-8995
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✦ Synopsis
Nylon 66/mesoporous molecular sieve (pore diameter: 2.7 nm) composites were prepared by annealing mixtures of nylon 66 and mesoporous molecular sieve (FSM) powders under high pressures and high temperature (FSM content: 0 -60 wt %; pressure: 0.5-30 MPa; temperature: 300°C; time: 1 h). X-ray diffraction and TEM measurements indicated the presence of the pores of FSM in the composite. Above 2 MPa, nylon 66 was charged in the pores of FSM. The fraction of the charged nylon 66 increased with pressure and was independent of the FSM content (pressure: 2-30 MPa; fraction of charged nylon 66: 54 -66%). The infrared spectrum of the composite showed the bands based on SiOO, COH, NOH, CAO. DSC measurement indicated that the heat of fusion of nylon 66 crystallite in the FSM pores was low compared with that of nylon 66. The composites prepared above 2 MPa were found to be superior in storage modulus to nylon 66. The modulus increased with an increase in the fraction of charged nylon 66 and the amount of FSM.