当前位置: X-MOL 学术Mater. Today Commun. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Thermal stability of poly(l-lactide) α’ crystals and its blocking effect on perfection of α crystals
Materials Today Communications ( IF 3.7 ) Pub Date : 2020-01-07 , DOI: 10.1016/j.mtcomm.2020.100900
Rui Zhu , Run Zheng , Lianlian Fu , Zhaolei Li , Chao Yan

Thermal stability of poly(L-lactide) (PLLA) α’ crystals and its blocking effect on perfection of α crystals was reported in this manuscript. The results showed that, with annealing temperature (Ta) approaching to 150 °C, most α’ crystals transformed into α crystals, and the others with higher thermal stability still existed in those annealed samples. Interestingly, experiencing identical annealing, α crystals with residual α’ crystals displayed the bigger long period but the smaller lamella thickness than that of α crystals directly formed at 130 °C. Further, after the residual α’ crystals were totally melted, during annealing at a higher temperature, both lamella thickness and crystallinity of α crystals increased faster than that of α crystals with residual α’ crystals, even the latter was annealed at a lower temperature. This result is considered to promote understanding of the genesis of the PLLA α՛ crystals and the mechanism of α՛ to α transformation.



中文翻译:

聚(l-丙交酯)α'晶体的热稳定性及其对α晶体完善的阻挡作用

该手稿中报道了聚L-丙交酯(PLLA)α'晶体的热稳定性及其对α晶体完善的阻挡作用。结果表明,随着退火温度(T a)温度接近150°C时,大多数退火后的样品中仍存在大部分的α'晶体转变为α晶体,而其他具有较高热稳定性的晶体仍然存在。有趣的是,经历相同的退火,具有残留α'晶体的α晶体与直接在130°C形成的α晶体相比,具有更长的周期,但薄片厚度更小。此外,在残余α′晶体完全熔化之后,在较高温度下的退火过程中,即使具有较低的α′晶体,α晶体的薄片厚度和结晶度的增加都快于具有残余α′晶体的α晶体。认为该结果有助于增进对PLLAα1晶体的起源以及α1至α转变的机理的理解。

更新日期:2020-01-07
down
wechat
bug