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Quan sát tình huống về hành vi biến đổi pha trung gian và phân tích cơ chế trong β-resin
Carbon Letters - Trang 1-13 - 2024
Tóm tắt
β-Resin được chiết xuất bằng phương pháp tách dung môi từ nhựa than đá tinh chế. Nhiều phương pháp phân tích cho thấy rằng β-resin có cấu trúc xếp chồng mặt phẳng aromatic tốt hơn và số lượng dư lượng carbon cao hơn, khiến nó lý tưởng cho quá trình biến đổi pha trung gian. Quá trình chuyển đổi pha trung gian của β-resin (sự hình thành các khối cầu lỏng tinh thể, sự phát triển của các khối cầu pha trung gian, và sự hợp nhất cũng như phân tách các khối cầu pha trung gian) đã được quan sát tại chỗ bằng kính hiển vi phân cực với đế nhiệt. Hơn nữa, cơ chế chuyển đổi pha trung gian của β-resin đã được nghiên cứu ở từng giai đoạn chuyển đổi. Hàm lượng pha trung gian và động học chuyển đổi pha trung gian đã được phân tích dựa trên phương pháp diện tích và phương pháp thay thế không tan quinoline (QI). Cả hai phương pháp đều cho thấy sự thay đổi trong hàm lượng pha trung gian của β-resin. Tuy nhiên, kết quả thử nghiệm của hai phương pháp này có phần hơi khác nhau ở giai đoạn đầu của biến đổi pha trung gian và có xu hướng nhất quán trong giai đoạn sau.
Từ khóa
#β-resin #chuyển đổi pha trung gian #cấu trúc xếp chồng #động học #kính hiển vi phân cựcTài liệu tham khảo
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