LLDPE (DJM1820) was obtained from Sinopec Yangzi Petrochemical Company Ltd (Nanjing, China). Analytical reagent grade CaCO 3 , SiO 2 , MgO and ZnO were obtained from Guangdong Xilong Chemical Co., Ltd (Shantou, China). Analytical reagent grade H 3 BO 3 was supplied by Shanghai Lingfeng chemical reagent Co., Ltd (Shanghai, China). Milled E-glass fibre (MEF) was obtained from Nanjing Lvzhou Building Material Factory (Nanjing, China). The diameter and ratio of length to diameter of MEF are 10-15μm and 5-10, respectively. Chopped E-glass fibre (CEF) was obtained from Shandong Sanyu Group Co., Ltd (Zibo, China). The length and diameter of CEF are about 6 mm and 20μm, respectively. The softening point of MEF and CEF are all 840 ο C. γ-Aminopropyl triethoxysilane (KH-550) was supplied by Nanjing Xiangfei Chemical Research Institute (Nanjing, China). X-ray diffraction with Cu Ka radiation (XRD ARL X'TRA) was used to determine the phase structures of these samples. Scanning electron microscopy (SEM JSM-5900) was used to examine the microstructures of composites and their residues. Differential Scanning Calorimeter (Netzsch DSC 204
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