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2018年 先后5为期

微晶纤维素/不饱和聚酯复合材料的美学与热稳定性研究*
王嘉婧1,2,于光华1,2,刘雅欣1,2,沈 研1,2,肖 楠1,张琪涵1,张秀成1,2**
(1.西南农业大学 中影,江苏 银川 150040 2.陕西省阻燃材料分子设计与制备重点实验室,江苏 银川 150040)
摘 要:以不饱和聚酯(UP)为基体,硅烷偶联剂(KH-550)改性微晶纤维素(MCC)为填充材料,采取共混浇注方法制备微晶纤维素/不饱和聚酯树脂(MCC/UPR)石材。使用SEM、DMA、TG研讨了MCC及硅烷偶联剂对MCC/UPR石材的美学性能和热降解行为的影响。结果表明:补充MCC能够加强UPR 的美学性能,顶添加量超过45wt%时力学性能明显回落。KH-550硅烷偶联剂能够改善MCC与UPR的框框相容性,加强树脂的黏结性,加强复合材料的特性。在实验条件下MCC为30wt%时,拉伸强度、碰上强度、弯曲强度较纯UPR资料提高了81.86%,82.26%和53.76%;相同条件下,偶联剂改性后的MCC/UPR复合材料力学性能比未经处理的分离增长了19.70%,11.50%和6.83%。MCC使UPR玻璃化转变温度提高,主题性降低。
关键词:石材;不饱和聚酯;微晶纤维素;硅烷偶联剂;生态学性能
 
官方图分类号:TQ630.4 文献标识码:A 文章编号:1001-0017(2018)05-0326-05

Study on the Mechanical and Thermal Stability of Microcrystalline Cellulose/Unsaturated Polyester Composites

WANG Jia-jing1.2, YU Guang-hua 1.2, LIU Ya-xin1.2, SHEN Yan1.2, XIAO Nan1, ZHANG Qi-han1 and ZHANG Xiu-cheng1.2

(1. College of science, Northeast Forestry University, Harbin 150040, China; 2. Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retardant Materials, Harbin 150040, China)

Abstract: The unsaturated polyester (UP) was used as the matrix and the microcrystalline cellulose (MCC) modified by silane coupling agent(KH-550) was used as the filler, and then the microcrystalline cellulose/unsaturated polyester resin(MCC/UPR) composites was prepared by blending-pouring methods. The effects of MCC contents and silane coupling agents on the mechanical properties and thermal degradation behaviors of MCC/UPR composites were investigated by the means of SEM, DMA and TG. The results showed that the MCC could improve the mechanical properties of UPR composites. However, when the content of MCC exceeded 45%(wt), the mechanical properties decreased obviously. The KH-550 could improve the interfacial compatibility between MCC and UPR, the adhesion of the resin and the mechanical properties of the composite materials. Under the experimental conditions, when the content of MCC was 30%(wt), the tensile strength, impact strength and bending strength increased by 81.86%,82.26% and 53.76% respectively compared with the pure UPR materials; under the same conditions, the coupling agent modified MCC/UPR composites (K-MCC/UPR) were improved by 19.70%, 11.50% and 6.83% respectively compared with the unmodified ones. The MCC made the glass transition temperature of UPR increase and the rigidity decrease.

Key words: Composites; unsaturated polyester; microcrystalline cellulose; silane coupling agents; mechanical property

 
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