Phenolic molding compound filled with nonmetals of waste PCBs.
Nonmetals reclaimed from waste phenolic cellulose paper printed circuit boards (PCBs) are used to replace wood flour in the production of phenolic molding compound (PMC). The results indicate that filling of nonmetals in PMC improves the charpy notched impact strength and heat deflection temperature (HDT) and reduces flexural strength and rasching fluidity. Rasching fluidity decreases dramatically with the increase of the content of nonmetals. To ensure sufficient properties of PMC, the optimal added content of nonmetals is 20 wt %, which results in a flexural strength of 70 MPa, a charpy notched impact strength of 2.4 KJ/m2, a HDT of 168 degrees C, a dielectric strength of 3.9 MV/m, and a rasching fluidity of 103 mm, all of which meet the national standard data. When the added content of nonmetals is 20%, the charpy notched impact strength, HDT, and rasching fluidity of PMC decrease, and the flexural and dielectric strengths decrease at first and then increase with decreasing particle sizes. All the results indicate that making PMC with nonmetals of waste PCBs can resolve environmental pollution, reuse nonmetals in different fields, and provide a new method for resource utilization of nonmetals from waste PCBs.
Guo
Jie
J
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
Li
Jia
J
Rao
Qunli
Q
Xu
Zhenming
Z
D000814:Aniline Compounds / Q000737:chemistry; D002119:Calcium Carbonate / Q000737:chemistry; D003247:Conservation of Natural Resources; D004581:Electronics; D005557:Formaldehyde / Q000737:chemistry*; D006358:Hot Temperature; D007220:Industrial Waste; D008277:Magnesium Oxide / Q000737:chemistry; D008709:Methenamine / Q000737:chemistry; D010316:Particle Size; D010636:Phenols / Q000737:chemistry*; D011078:Polychlorinated Biphenyls; D011108:Polymers / Q000737:chemistry*; D013229:Stearic Acids / Q000737:chemistry; D013314:Stress, Mechanical; D013627:Talc / Q000737:chemistry; D014934:Wood
D000814:Aniline Compounds; D007220:Industrial Waste; D010636:Phenols; D011108:Polymers; D013229:Stearic Acids; D013627:Talc; D005557:Formaldehyde; D008277:Magnesium Oxide; C031183:stearic acid; C002712:nigrosin; C011529:phenol-formaldehyde resin; D011078:Polychlorinated Biphenyls; D002119:Calcium Carbonate; D008709:Methenamine