Rice straw was modified by in situ polymerization of ammonium polyphosphate (APP) polyelectrolyte. FTIR and SEM results indicated that APP polyelectrolyte was grafted into rice straw surface and attracted silica granules. APP polyelectrolyte showed a uniform distribution on surface of rice straw. Composites containing high-density polyethylene (HDPE) and the modified rice straw with APP polyelectrolyte were prepared. By incorporating APP polyelectrolyte of 15 wt%, limited oxygen index (LOI) of rice straw-HDPE composites (RPCs) reached to 23.5%. Introducing neat rice straw to HDPE resulted in a reduction in peak heat release rate (pHRR) of 563.7 kW/m² for RPCs compared with 1223.8 kW/m² for pure HDPE. For RPCs with APP polyelectrolyte of 15 wt%, pHRR reached to 488.4 kW/m². An intumescent, stable, and compact char layer, consisting of PC, PNC, CC, SiOP, and SiP, resulted in an improvement on flame retardancy of RPCs.

通过聚磷酸铵（APP）聚电解质的原位聚合改性稻草。FTIR和SEM结果表明，APP聚电解质被接枝到稻草表面并吸引了二氧化硅颗粒。APP聚电解质在稻草表面显示出均匀的分布。制备了包含高密度聚乙烯（HDPE）和带有APP聚电解质的改性稻草的复合材料。通过掺入15 wt％的APP聚电解质，稻草-HDPE复合材料（RPC）的极限氧指数（LOI）达到23.5％。引入整齐稻草HDPE导致峰值热释放速率563.7千瓦/米的（PHRR）降低²用于与1223.8千瓦/米相比的RPC ²用于纯HDPE。对于具有15 wt％APP聚电解质的RPC，pHRR达到488.4 kW / m ²。一种泡沸的，稳定的和紧凑的炭层，其由P的C，P Ñ C，C的C，Si Ò P和Si P，导致对的RPC的阻燃性的改善。