In a resin composite, polyolefine grains are dispersed in a polyamide matrix. Each of the polyolefine grains has a core made of an unmodified polyolefine and a shell made of another polyolefine that is modified. In one embodiment, the core is made of a crystalline polypropylene resin (C), and the shell is made of modified copolymer (B) having ethylene units and α-olefine units. The modified copolymer (B) may have the α-olefine units as a major component. The resin composite has 30 to 80 percents by weight of polyamide (A), 1 to 30 percents by weight of the modified copolymer (B), and 19 to 69 percents by weight of the crystalline polypropylene resin (C) wherein the sum of the polyamide, the modified copolymer, and the crystalline propylene resin is 100 percents by weight. In another embodiment, the core is made of an unmodified copolymer (E) having ethylene units and α-olefine units, and the shell is made of a modified crystalline polypropylene resin (D). The copolymer may have the ethylene units as a major component. The resin composite has 30 to 80 percents by weight of the polyamide (A), 5 to 50 percents by weight of the modified crystalline polypropylene resin (D), and 5 to 65 percents by weight of the copolymer (E) wherein the sum of the polyamide, the modified crystalline polypropylene resin, and the copolymer is 100 percents by weight. The unmodified crystalline polypropylene resin (C) is modified with at least one of α,β-unsaturated caboxylic acid and α,β-unsaturated caboxylate to give the modified crystalline polypropylene resin (D). The resin composite has both the properties possessed by polyamide and the properties possessed by polyolefine in good balance, and further has properties that are not sufficiently possessed by the polyamide or polyolefine, specifically, low warpage upon molding, good dimensional stability and good impact resistance.
在
树脂复合材料中,聚烯烃颗粒分散在聚酰胺基体中。每个聚烯烃颗粒都有一个由未改性聚烯烃制成的内核和一个由另一种改性聚烯烃制成的外壳。在一个实施方案中,核心由结晶聚
丙烯树脂(C)制成,外壳由具有
乙烯单元和 α-烯烃单元的改性共聚物(B)制成。改性共聚物(B)的主要成分可能是 α-烯烃单元。
树脂复合材料中聚酰胺(A)的重量占 30-80%,改性共聚物(B)的重量占 1-30%,结晶聚
丙烯树脂(C)的重量占 19-69%,其中聚酰胺、改性共聚物和结晶聚
丙烯树脂的重量总和为 100%。在另一个实施方案中,芯由具有
乙烯单元和 α-烯烃单元的未改性共聚物 (E) 制成,壳由改性结晶聚
丙烯树脂 (D) 制成。共聚物的主要成分可能是
乙烯单元。
树脂复合材料中聚酰胺(A)的重量占 30-80%,改性结晶聚
丙烯树脂(D)的重量占 5-50%,共聚物(E)的重量占 5-65%,其中聚酰胺、改性结晶聚
丙烯树脂和共聚物的重量总和为 100%。用 α,β-不饱和卡波氧酸和α,β-不饱和卡波氧酯中的至少一种对未改性结晶聚
丙烯树脂 (C) 进行改性,得到改性结晶聚
丙烯树脂 (D)。这种
树脂复合材料兼具聚酰胺和聚烯烃的特性,还具有聚酰胺和聚烯烃所不具备的特性,特别是成型时翘曲小、尺寸稳定性好和抗冲击性强。