also rigid that 会儿, has plastics parts is cracking. supply how 搞, 他们回一句 very simple 话: that is tough property, add 点橡胶就 good. 结果呢? impact resistant is issues, is peeling, is resistant 寒, semi month 也没搞定. that 时候我才意识 to, toughened is add elastomer that simple. material performance property 时, to 底该引入哪 types toughening agent? this water can is deep very. 我们先 看 lower plastics fracture and toughened essence. is what plastics fracture? plastics in for high speed impact 时, separation 子链根本 不 and 做出任何 material 理响应, method through hot 运动消 nano can amount. this type of 响应滞 rear 导致 动 force 学冻结 , make impact can 以 势 can 形式积 poly in micro defect 处（如杂质, micro 孔）. local force in ultra- C-C键 or separation function force 极限, chemical 键 便会发生 fracture , 瞬间释放 巨 large can amount cracks 呈爆炸式 expand 展. toughening agent function in micro upper 讲, toughening agent can to toughened function, is it resistant outer force, is “搞破 bad ‘: 当 impact 临时, it as is force in 点, strong/high 迫周围 separation 子链发生 slip and orientation, generate a large amount of micro small or belt/tape, 进入屈服状态. large can is hot can, in fracture front can amount “ consumption dispersion ”掉. this is 他们说 诱导 consumption can, is toughening agent core function mechanism . 当 generate cracks to toughening agent 时, toughening agent 会发生剧烈 deformation, 就像 heavy in upper , cracks by 瞬间钝化, meanwhile reduce force strong/high degree, make cracks method expand 展. 一句话 summary: toughened, essence upper is 以无数 micro local 主动屈服, macro overall 绝不崩溃 . toughened large inventory/review 主链 is polyethylene (PE) （PE）, is long 链, saturated and 链, has di 键. has plastics thermoplastic property, also has high elastic property. pellets 状, resistant aging, processing its 方便. it is currently general purpose PP, PE modified 首选. 主链也 is saturated and 链, is can 硫化, in upper di mono 体. low temperature resistance property can 绝佳, it is block 状, need 切胶, 密炼, for di screw extrusion machine non 常不友 good, processing cost high. styrene （S）- butadiene （B）- styrene （S） “三明治” structure. although 便宜, in 间段含 di 键, 见 light 死 , easy 变黄发脆. hydrogen rear high grade 版, weather resistance 直接拉满, is high outer parts 标配. 核 housing/shell structure polymer 像 洋葱, soft 核（ polypropylene (PP) acid ester, poly silicon oxygen and other ） hard housing/shell （MMA and other and resin versus property good ）. this type of structure can has 效引发基体 generate property deformation absorption can amount, also can and 基体良 good versus uniform dispersion, for material rigid property, strong/high degree and heat resistant property effect/influence versus for relatively small. cost relatively high, suitable for high transparent products （如 medical consumption 材）. and PC, PS versus property good, transparent and tough property excellent selection. 兼顾 toughened and UV resistant, is physical properties and appearance balanced device. non property POE想进极 property PA or 者PBT? 此刻就 need MAH this active property 基团钩子, in extrusion process in and resin amine or 端羟基发生 chemical reaction, formed grafting copolymer, will toughening agent elastomer solid in versus interface upper. nano carbon acid 钙/SiO₂: through nano grade rigid property pellets 诱发基体屈服. this type of methods in 于: improves tough property meanwhile, loss rigid property . toughened is add, summary different 基材 选 type method: 首选 POE. property ratio 之王, dispersion property 极佳.
- 极端 resistant 寒: EPDM. -50℃ ring lower tough property stability, suitable for automotive 保险杠, pallet.
- low cost: recycled powder / high powder. combined thick 壁, low property can requirements injection molding parts.
attention/notes: in polyolefin add SBS, property 不匹配会导致严 heavy 层离 peeling .
- hard pipe/tube: 选CPE（ chlorine polyethylene (PE) ）, improvement processing and tough property, 经济实惠, effect/influence weather resistance.
- high transparent parts: MBS, light rate most good.
- surface light parts: 选ACR, toughened also can promote 塑化, belt/tape “美颜”效果.
polystyrene (PS) type (PS / HIPS / ABS)
- 首选: SBS/SEBS. SBS and PS is hydrophilic 兄弟, has styrene sheet/slice 段, property 一致. used for HIPS rise grade or home appliances outer housing/shell. for outer PS挂 parts, must use SEBS, anti light powder 化, 变脆.
- 保透 solution/scheme: K-胶 (styrene - butadiene copolymer). light rate and PS“灵魂契 combined ”, transparent packaging box/case 首选.
必 must use POE-g-MAH, it is currently application most nylon toughening agent 之一, its separation saturated and, resistant aging property can excellent, in -40℃ low temperature lower still can nylon excellent impact resistant property can.
- 保 transparent: specialized nano has machine silicon.
- solution strong/high degree （PC/ABS）: 首选MBS or large molecular weight ABS grafting powder.
首选 GMA grafting toughening agent （如AX8900）. it can anti flame retardant degradation, impact strong/high degree. toughened this active 儿, dry to most rear is in balanced 术. 别迷信 large 牌, 也别 图便宜, separation 子层面 for upper 眼, add again more 也白搭. true positive high 手, is 看准时 machine, lower 手, let product tough soft, rigid 而不脆. 你 in toughened type upper which “ peeling ” or “不 resistant 寒” 坑? or to what “越 add 越脆” 鬼故事? 欢迎 in comments 区 留言, 我们一起拆 understanding.
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