Qun Gu's research while affiliated with Chinese Academy of Sciences and other places

... The growth of crystalline aggregates is not confined to polymers; it can also occur in tiny molecule compounds with similar optical patterns [10][11][12][13][14]. For the past half a century, the phenomena of circular ringed spherulites with periodicity and optical birefringence spiral/concentric bands have attracted interest [15][16][17][18][19]. Polymer spherulites are composed of lamellae-like crystals that are self-arranged by radiating outward from a common center; often, polymer spherulites display periodic bands, as exemplified in several recent review articles [20][21][22][23][24][25][26]. Such a ring-banded assembly is also common in aromatic polyesters, which are defined by repeating chemical units of varying lengths of methylene segments between two terephthalate groups. ...

... Ultra-high-molar mass polyethylene (UHMWPE) is an important polymer that has been widely used in a variety of applications, such as in the biomedical area for surgical lines, implants and orthopedic joint replacement components, as well as in the aerospace, steel industry and ballistic armor [1][2][3][4]. ...

... The UHMWPE peak was seen to exhibit sharp increase of crystalline peak befitted long and unbranched polymer crystalline structure and arrangement [76,77], while CNF peak shows semi crystalline pattern indicating existence of crystalline and amorphous region of the cellulose chains [78,79]. Additionally, all polymer and bionanocomposites samples exhibited similar pattern with two prominent diffraction peaks centered at around 22.0 • and 24.4 • of 2θ, which correspond to (110) and (200) reflection of polyethylene in orthorhombic phase [80][81][82]. The diffraction peak of the filler could not be observed due to low percent loading [81,83] and overlapped peak of UHMWPE with CNF at around 22 • in 2θ, which was in agreement with reported studies involving nanocellulose filler in polyethylene matrix [40,84]. ...

... The peculiarities of PLA stereocomplexation are widely studied in the literature (see e.g. [4][5][6][7][8][9][10] ). It is well known that a number of parameters such as: the molar mass and the optical purity of the enantiomers, the mixing ratio between the two isomers as well as the processing technique applied for the preparation of the polymer material; affect the formation of scPLA. ...

... The crystallinity (X c %) of all samples in two methods has increased compared to neat PLLA. This enhancement in crystallinity is attributed to nucleating effect of GnP particles which is in agreement with other works [18,19]. However, the effect of GnP in the crystallinity is highest in the GC. ...

... The authors also observed that the cold crystallization temperature of the nanocomposite increased with higher graphene content. In their study, Chen et al. [29] investigated the PLA/graphene microstructure under non-isothermal crystallization, varying the cooling rate from 0.5 to 4 °C min −1 , revealing that as the cooling rate increased, the maximum mass loss rate and crystallization temperatures decreased. On the other hand, Chartarrayawadee et al. [30] found that the addition of graphene did not significantly affect the glass transition and melting temperatures of PLA. ...

... The authors achieved a sustained release of the antibiotic for months as well as a strong bacterial zone inhibition of S. epidermidis after 7 days in release media. PLLA is one of the gold standard biopolymers used for biomedical applications; however, other biopolymers such as polylactide glycolide (PLGA) [18], polydioxanone (PDS) [19] polylactide (PLA), [6,20] and polyhydroxyalkanoates (PHAs) [20,21] can also be used as innovative materials to generate sutures. ...

... However, the molecular weight distributions differed slightly, possibly due to the different interactions between the functional segments and GPC chromatographic columns. 43 Sequence-controlled self-assembly and drug delivery properties ...

... Researches of virgin PP/PS mixtures are found in the scientific literature [27][28][29][30] , mainly due to the low cost and technological relevance of these materials. Brostow et al 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 A c c e p t e d M a n u s c r i p t There are several works in the scientific literature 28,[33][34][35][36][37] which have reported the development of blends made with virgin PS/PP and PS/PP/compatibilizer, emphasizing mechanical, thermal, rheological and morphological properties, being widely discussed. However, these works used virgin PP and no mention was made about blends based on hybrid and recycled PPs with PS matrix, thus configuring a relevant point to be explored. ...

... These scaffolds exhibited good biocompatibility and biodegradability and were shown to promote the repair of neurological defects in brain-injured rats [27]. In addition, we have successfully developed a series of PU NPs and drug-loaded PU scaffolds that can target tumors at multiple levels, increase drug uptake, and effectively inhibit tumor growth [28][29][30][31][32][33]. ...