Injection molding method for high-strength bimodal polyethylene/chitin nanocrystalline composite

• Main Authors: ZHU MENGJIE, WANG ZONGBAO, BIE DAKUI
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2018
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to an injection molding method for a high-strength bimodal polyethylene/chitin nanocrystalline composite. According to the injection molding method, specific chitin nanocrystalsare added in specific bimodal polyethylene, molecular chains of the high molecular weight part in the bimodal polyethylene are adsorbed through the chitin nanocrystals, the recovery time of extended chains in a melt is increased, technological parameters in the processing process are adjusted and controlled, especially shish-kebab crystals are promoted to be formed through rapid cooling of a mold,and the mechanical properties of a bimodal polyethylene injection-molded product are effectively improved. The injection molding method is a method suitable for industrial production and efficient preparation of bimodal polyethylene composite products. 本发明涉及种高强度双峰聚乙烯/甲壳素纳米晶复合材料的注塑成型方法。本发明在特定双峰聚乙烯中添加特定甲壳素纳米晶，利用甲壳素纳米晶吸附双峰聚乙烯中高分子量部分的分子链、增加伸直链在熔体中的回复时间，调控加工过程中的工艺参数特别是通过模具的快速降温促进shish-kebab晶体的形成，有效提升双峰聚乙烯注塑制品的力学性能。该方法是种适合工业生产、