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A "SIZING" on glass fiber serves what dual function?
A{'text': 'Decoration only', 'label': 'A'}
B{'text': 'Adds weight', 'label': 'D'}
C{'text': 'Reduces cost', 'label': 'C'}
D{'text': 'PROTECTION of the fiber surface during handling + a COUPLING AGENT (typically silane) that chemically bonds glass to the matrix resin', 'label': 'B'}
Answer & Solution
Correct answer: D. {'text': 'PROTECTION of the fiber surface during handling + a COUPLING AGENT (typically silane) that chemically bonds glass to the matrix resin', 'label': 'B'}
Sizing is a microscopic surface coating applied immediately after drawing. It (1) protects glass from abrasion (uncoated glass is very notch-sensitive) and (2) provides a chemical link (Si-O-Si bonds) between the hydrophilic glass surface and the hydrophobic polymer matrix.
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