Styrene butyl acrylate (SBA) copolymer latex nanoparticles which contain vinyltrimethoxysilane as binding agent were prepared using microemulsion polymerization and were used for coating sisal fiber. The structure of SBA and coated sisal fiber (CF) was confirmed by Fourier transform infrared spectroscopy. The effect of the surface coating of sisal fiber (SF) on the SF/natural rubber (NR) composite properties was systematically evaluated through curing characteristics, morphological properties, mechanical properties, water absorption resistance, biodegradability and dynamic mechanical analysis. As indicated from the morphological study, the coating of SF with SBA enhanced the interfacial adhesion between SF and the NR matrix. In addition, the tensile strength was improved by 26.9% and 43% after the addition of 5 and 10 phr (parts per hundred rubber), respectively, of CF to NR. The coating process improved the water resistance of SF/NR composite significantly especially at high SF loading level, where the composite that contained 30 phr CF absorbed 6.7% water compared to 13.2% for the composite containing uncoated sisal fiber (UF). Dynamic mechanical analysis confirmed that the coating process improved the interfacial adhesion between the SF and NR matrix as indicated from the higher values of storage modulus and lower values of maximum loss factor (tan δ_max) recorded for composites containing CF compared to those containing UF. © 2021 Society of Industrial Chemistry.

中文翻译：

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纤维涂层对剑麻纤维/天然橡胶复合材料力学性能、吸水率和生物降解性的影响

采用微乳液聚合法制备了以乙烯基三甲氧基硅烷为结合剂的苯乙烯丙烯酸丁酯（SBA）共聚物胶乳纳米粒子，用于涂覆剑麻纤维。SBA 和涂层剑麻纤维 (CF) 的结构由傅里叶变换红外光谱证实。通过固化特性、形态特性、力学性能、抗吸水性、生物降解性和动态力学分析，系统评价了剑麻纤维（SF）表面涂层对SF/天然橡胶（NR）复合材料性能的影响。从形态学研究中可以看出，SF 与 SBA 的涂层增强了 SF 和 NR 基质之间的界面粘合力。此外，拉伸强度提高了26。分别在 5 和 10 phr（每百份橡胶中的份数）中加入 CF 到 NR 后分别增加 9% 和 43%。涂层工艺显着提高了 SF/NR 复合材料的耐水性，尤其是在高 SF 负载水平下，其中含有 30 phr CF 的复合材料吸收了 6.7% 的水，而含有未涂层剑麻纤维 (UF) 的复合材料则为 13.2%。动态力学分析证实，涂层工艺提高了 SF 和 NR 基体之间的界面附着力，这从更高的储能模量值和更低的最大损耗因子值（tan 2% 对于含有未涂层剑麻纤维 (UF) 的复合材料。动态力学分析证实，涂层工艺提高了 SF 和 NR 基体之间的界面附着力，这从更高的储能模量值和更低的最大损耗因子值（tan 2% 对于含有未涂层剑麻纤维 (UF) 的复合材料。动态力学分析证实，涂层工艺提高了 SF 和 NR 基体之间的界面附着力，这从更高的储能模量值和更低的最大损耗因子值（tanδ _max ) 记录的含有 CF 的复合材料与含有 UF 的复合材料相比。© 2021 工业化学学会。