CAJ | 학술논문

以2，2′–(1，3–亚苯基)–二噁唑啉(1，3–PBO)为扩链剂，在双螺杆挤出机中对废旧丙烯腈–丁二烯–苯乙烯塑料(rABS)进行熔融扩链，并研究了1，3–PBO含量变化对rABS的相对分子质量、力学性能、动态力学性能和断面形貌特征的影响。结果表明，与rABS相比：扩链产物的相对分子质量大幅提高，数均相对分子质量达到20885；产物的力学性能显著提高，缺口冲击强度提高到rABS的近三倍；产物的储能模量、损耗模量明显增加，聚丁二烯(PB)相的玻璃化转变温度(Tg)降低，苯乙烯／丙烯腈共聚物(SAN)相的Tg升高；产物断面的形貌变得粗糙，相界面得到修复。
이2，2′–(1，3–아분기)–이오서람(1，3–PBO)위확련제，재쌍라간제출궤중대폐구병희정–정이희–분을희소료(rABS)진행용융확련，병연구료1，3–PBO함량변화대rABS적상대분자질량、역학성능、동태역학성능화단면형모특정적영향。결과표명，여rABS상비：확련산물적상대분자질량대폭제고，수균상대분자질량체도20885；산물적역학성능현저제고，결구충격강도제고도rABS적근삼배；산물적저능모량、손모모량명현증가，취정이희(PB)상적파리화전변온도(Tg)강저，분을희／병희정공취물(SAN)상적Tg승고；산물단면적형모변득조조，상계면득도수복。
Recycled acrylonitrile–butadiene–styrene plastic(rABS) was chain extended by 2,2'–(1,3–phenylene)bis(2–oxazoline)(1,3–PBO) in twin-screw extruder,and the effects of PBO content on molecular weight,mechanical properties,dynamic mechanical properties and morphology of rABS were studied. The results indicate that,compared with rABS,the molecular weight of chain-extended products is increased drastically and the number-average molecular weight reach up to 20 885;the mechanical properties of products are obviously improved and the notch impact strength is about 3 times the value of that of rABS;the storage modulus and loss modulus are markedly increased,theTg of products show a drop in polybutadiene(PB) phase while a rise in styrene/acrylonitrile copolymer (SAN) phase;the fracture surface become more blurred and phase interface is repaired.