Wang Yuming, Cheng Lihong, Cui Xiaoqian, Guo Weihong
Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Department of Polymer Science, The University of Akron, Akron, OH 44325-3909, USA.
Polymers (Basel). 2019 Jul 17;11(7):1198. doi: 10.3390/polym11071198.
Glass fiber with different content and different kinds of compatibilizers were used to prepare glass fiber-reinforced polypropylene (GFRP) composites. β-nucleating agent with different content was used to prepare β-polypropylene (PP), after which the toughness, crystallization ability and heat resistance were all enhanced. Differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) showed that the crystallite degree and crystallization ability were all greatly improved and β-PP was in dominant position. At last, both β-nucleating agent and glass fiber were used to modify the PP composites (β-GFRP). The formation of β-form PP made the matrix softer, which was beneficial for energy absorption and enhancement of toughness. The tensile strength, flexural strength and flexural modulus were improved dramatically, which were attributed to the coeffect of framework structure of GF and β-form PP.
采用不同含量及不同种类的相容剂的玻璃纤维制备玻璃纤维增强聚丙烯（GFRP）复合材料。使用不同含量的β成核剂制备β-聚丙烯（PP），其韧性、结晶能力和耐热性均得到增强。差示扫描量热法（DSC）和广角X射线衍射（WAXD）表明，微晶度和结晶能力均大幅提高，且β-PP占主导地位。最后，同时使用β成核剂和玻璃纤维对PP复合材料（β-GFRP）进行改性。β晶型PP的形成使基体更柔软，有利于能量吸收和韧性增强。拉伸强度、弯曲强度和弯曲模量显著提高，这归因于GF的骨架结构与β晶型PP的协同作用。
