CAJ | 학술논문

采用DSC、XRD分析方法研究了聚苯乙烯刚性微粒(XPS)和天然胶乳包覆聚苯乙烯刚性微粒(N-XPS)对聚内烯(PP)结品行为的影响.结果表明:XPS和N-XPS均可加快PP在高温区的成核速率,导致PP在较高的温度下提前结晶;它的存在也阻碍了PP球晶的生长速率,使总结晶度降低,相比较而言,其中N-XPS有更好的效果.XRD分析表明:在PP中添加2%的XPS或N-XPS,均可诱导PP形成β结晶,增加用量,β-PP结晶峰消失;PP/N-XPS试样中20=14.02°的α晶(110)峰明显比纯PP的要小这一事实,佐证了N-XPS阻碍了PP(α-110)晶面的生长,使其结晶度降低的结果.
채용DSC、XRD분석방법연구료취분을희강성미립(XPS)화천연효유포복취분을희강성미립(N-XPS)대취내희(PP)결품행위적영향.결과표명:XPS화N-XPS균가가쾌PP재고온구적성핵속솔,도치PP재교고적온도하제전결정;타적존재야조애료PP구정적생장속솔,사총결정도강저,상비교이언,기중N-XPS유경호적효과.XRD분석표명:재PP중첨가2%적XPS혹N-XPS,균가유도PP형성β결정,증가용량,β-PP결정봉소실;PP/N-XPS시양중20=14.02°적α정(110)봉명현비순PP적요소저일사실,좌증료N-XPS조애료PP(α-110)정면적생장,사기결정도강저적결과.
The effects of the polystyrene rigid particles (XPS) and PS particles coated by natural rubber (N-XPS) rigid particles on the crystallization behavior of polypropylene (PP) were investigated by differenti-al scanning calorimeter (DSC) and X-ray diffraction (XRD) experiments. Results indicated that XPS and N-XPS could accelerate nucleation rate of PP in high temperature region resulting in PP crystallizing in ad-vance in higher temperature, but they resisted the spherulitic growth rate of PP, and made the total crystal degree of PP decreased. Compared with XPS, N-XPS had better effect. XRD analysis showed that the crystal existed in PP by adding 2% of XPS or N-XPS and then the β-PP crystal peak disappeared with the XPS or N-XPS content increasing. The α crystal (110) peak at 20 = 14.02° in PP/N-XPS blends was more dis-tinctly smaller than that in the neat PP, which proved that N-XPS resisted the growth of the PP (α-110) crystal face to lower crystal degree.