Hàm lượng ph n khô ầ Hàm lượng ch t rấ ắn bay hơi pH
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trục vít v i t l PBS/TPS = 60/40 PKL có ch s ch y b ng 5,4 g/10 phút. Blend ớ ỷ ệ ỉ ố ả ằ chế ạo đượ t c có kh ả năng sử ụng để ổ d th i các lo i màng m ng vạ ỏ ới độ ổn định cao. Màng thổi được có độ dày 30 - 45µm, độ ền kéo 25,1 MPa, độ b dãn dài 261%. 3. Biến tính tinh b t b ng axit tartaric cho hi u qu ộ ằ ệ ả tương hợp cao v i nh a PBS ớ ự ở
hàm lượng tối ưu bằng 2,4% so v i t ng khớ ổ ối lượng blend, th hi n c u trúc pha ể ệ ở ấ của blend quan sát được trên ảnh SEM đồng nh t, gấ ần như khó phân biệt được hai pha do bám dính giữa hai đã được cải thi n rõ r ệ ệt.
4. Xúc tác thi c (0,15% so v i t ng khế ớ ổ ối lượng blend) đãchứng t kh ỏ ả năng xúc tác tốt đối v i ph n ng este hóa gi a nhóm OH ớ ả ứ ữ ở cuối m ch PBS và nhóm COOH ạ trong tinh b t biộ ến tính t o ra polyme ghép PBS-g- MTPS. ạ
5. Màng blend trên cơ sở blend PBS/MTP có kh ả năng phân hủy hoàn toàn thành CO2, H2O và mùn hữu cơ theo tiêu chuẩn EN 13432. Trong điều ki n t o compost ệ ạ
hi u khí có ki m soát nhiế ể ệt độ quy mô phòng thí nghi m mệ ức độ phân rã đạt 98,4% sau 30 ngày, mức độ phân h y thành COủ 2 đạt 97,70 % sau 52 ngày. Các s n ả ph m phân h y không b t k ẩ ủ ấ ỳ ảnh hưởng b t l i nào t i ấ ợ ớ môi trường t nhiên, cây ự đậu đen trong môi trường đất có ch a compost c a blend PBS/MTPS n y m m và ứ ủ ả ầ sinh trưởng bình thường. Trong điều ki n compost t nhiên, màng blend có kh ệ ủ ự ả năng phân hủy 95,8 % sau 141 ngày.
97
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