摘要
用多组分熔融接枝的方法将甲基丙烯酸缩水甘油酯( G M A) 和苯乙烯( St) 共同接枝于聚丙烯( P P) 上,制得多单体接枝聚丙烯 P Pg( G M Aco St) .该接枝物具有高的 G M A 接枝率.本研究利用 F T I R、 S E M、 T E M、 D S C 和力学性能测试等分析方法,研究了多组分熔融接枝聚丙烯( P Pg( G M Aco St)) 对尼龙6/ P P 共混物的形态结构, Tg 和力学性能的影响.结果表明, P Pg( G M Aco St) 中的环氧基团与尼龙6( P A6) 末端的胺基发生化学反应,原位形成的 P P P A6 共聚物能有效的改善 P A6 与 P P 的相容性,可以使 P P 均匀的分散在 P A6 基体中,相区尺寸明显减小,提高了拉伸强度.由于两相的相容性较好,从而共混物的 Tg 有明显的变化.此外,通过透射电镜观察,发现 P A6/ P Pg( G M Aco St)(70/30) 合金中存在着特殊的微相分离结构.
In a previous study ,the melt grafting of glycidal methacrylate( G M A) and styrene( St) onto polypropylene( P P) was carried out. The multi monomers melt grafted P P, P P g ( G M A co St) was used as a compatibilizer of P A6/ P Pblendsin this study . The addition of P P g ( G M A co St) markedly improved the mechanical properties of the incompatibilized P A6/ P P( P A6 content 70 % ) ,particularly in the tensile strength of the blends . There arealso significant changesin glass transition temperature ( Tg) for the blends characterized by D S Canalysis,implying excellentcompatibility between P A6 and P Pwith the addition ofthe P P g ( G M A co St) . Different blend morphologies were observed by S E M and T E Maccording to the content of P P g ( G M A co St) used . Aspecial novel microphase separatedstructure in the P A6/ P P g ( G M A co St) blends were observed . It should be due to theformation of P P P A6 copolymer by chemical reactions occurred between G M Ain P P g ( G M A co St) and the terminal amino or carboxylic groups of P A6 during the melt mixing . The formation of P P P A6 copolymeris also characterized by F T I R.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1999年第5期527-533,共7页
Acta Polymerica Sinica
关键词
尼龙6
聚丙烯
多单体
反应共混
接枝
共混物
Polyamide 6 , Polypropylene, Multi monomer, Reactive blending , Microphaseseparated structure